{"id":21263,"date":"2026-10-20T09:49:01","date_gmt":"2026-10-20T02:49:01","guid":{"rendered":"https:\/\/playeatsleep.fun\/?p=21263"},"modified":"2026-10-20T09:58:19","modified_gmt":"2026-10-20T02:58:19","slug":"in-a-world-full-of-zombies-anime-retbear-opening","status":"publish","type":"post","link":"https:\/\/playeatsleep.fun\/en\/in-a-world-full-of-zombies-anime-retbear-opening\/","title":{"rendered":"RetBear's New Song Is the Opening Theme for a Zombie Anime"},"content":{"rendered":"<p class=\"wp-block-paragraph\">The anime *In a World Full of Zombies, I\u2019m the Only One Who Doesn\u2019t Get Attacked* now has an opening theme. The song is titled \u201cNo Reaction (unknown Vo: 0in)\u201d and is performed by RetBear. RetBear is a music project by Vocaloid producer Kairiki Bear.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This announcement came from FlyingDog, Inc. on World Zombie Day. The anime will begin airing in January 2027 on AT-X. The key visual and main promotional video for the anime have also been released.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_89 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Serious Mode<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/playeatsleep.fun\/en\/in-a-world-full-of-zombies-anime-retbear-opening\/#Lagu_baru_pertama_RetBear_dalam_hampir_empat_tahun\" >RetBear's first new song in nearly four years<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/playeatsleep.fun\/en\/in-a-world-full-of-zombies-anime-retbear-opening\/#Kairiki_Bear_produser_Vocaloid_di_balik_RetBear\" >Kairiki Bear, the Vocaloid producer behind RetBear<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/playeatsleep.fun\/en\/in-a-world-full-of-zombies-anime-retbear-opening\/#Adaptasi_dari_manga_dengan_95_juta_unduhan\" >An adaptation of a manga with 9.5 million downloads<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/playeatsleep.fun\/en\/in-a-world-full-of-zombies-anime-retbear-opening\/#Tentang_RetBear\" >About RetBear<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Lagu_baru_pertama_RetBear_dalam_hampir_empat_tahun\"><\/span>RetBear's first new song in nearly four years<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cNo Reaction\u201d is RetBear\u2019s first new song in nearly four years. RetBear\u2019s previous song was \u201cDown Timer.\u201d That song was released in January 2023.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For this song, RetBear once again featured an anonymous guest vocalist. The guest vocalist is credited as \u201c0in.\u201d This name appears in the song title as \u201cunknown Vo: 0in.\u201d.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">RetBear wrote the lyrics, composed, and arranged this song. Streaming details for this song will be announced shortly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kairiki_Bear_produser_Vocaloid_di_balik_RetBear\"><\/span>Kairiki Bear, the Vocaloid producer behind RetBear<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kairiki Bear is a popular Vocaloid producer. Kairiki Bear is known for several hit songs, such as \u201cVenom\u201d and \u201cDarling Dance.\u201d The \u201cVenom\u201d video has reached 75 million views on YouTube. The \u201cDarling Dance\u201d video has reached 49 million views.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kairiki Bear's YouTube channel has amassed more than 480 million views. Kairiki Bear is also known as one of the leading figures in the Vocaloid world.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kairiki Bear is a composer and producer. RetBear is a music project founded by Kairiki Bear.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Adaptasi_dari_manga_dengan_95_juta_unduhan\"><\/span>An adaptation of a manga with 9.5 million downloads<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This anime is an adaptation of the manga *In a World Full of Zombies, I\u2019m the Only One Who Doesn\u2019t Get Attacked*. The manga has been downloaded more than 9.5 million times. Sales have also exceeded 750,000 copies. These sales figures include the spin-off series.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"1024\" src=\"https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-41-723x1024.webp\" alt=\"In a World Full of Zombies, I&#039;m the Only One Who Isn&#039;t Attacked\" class=\"wp-image-21264\" srcset=\"https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-41-723x1024.webp 723w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-41-212x300.webp 212w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-41-768x1087.webp 768w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-41-9x12.webp 9w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-41-247x350.webp 247w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-41-282x399.webp 282w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-41-640x906.webp 640w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-41-681x964.webp 681w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-41.webp 800w\" sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><figcaption class=\"wp-element-caption\">\u00a9Chihiro Masuda and Rokuro Uraji \/ Frontier Works Inc.<\/figcaption><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">The anime adaptation will air on AT-X starting in January 2027. The song \u201cNo Reaction\u201d by RetBear will serve as the opening theme for the anime.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tentang_RetBear\"><\/span>About RetBear<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">RetBear is an \u201canonymous\u201d music group. The group features Kairiki Bear collaborating with a different vocalist on each song. Each guest vocalist performs under the anonymous name \u201cunknown Vo.\u201d.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42.webp\" alt=\"\" class=\"wp-image-21265\" srcset=\"https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42.webp 800w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-150x150.webp 150w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-75x75.webp 75w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-300x300-1.webp 300w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-135x135.webp 135w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-178x178.webp 178w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-12x12.webp 12w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-194x194.webp 194w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-220x220.webp 220w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-341x341.webp 341w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-60x60.webp 60w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-360x360.webp 360w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-640x640.webp 640w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-681x681.webp 681w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-768x768.webp 768w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-400x400-1.webp 400w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-580x580.webp 580w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-160x160.webp 160w, https:\/\/playeatsleep.fun\/wp-content\/uploads\/2026\/10\/Untitled-June-23-2026-at-15.30.17-42-350x350.webp 350w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">Before \u201cNo Reaction,\u201d RetBear had already written two songs for anime. The first song was <a href=\"https:\/\/youtu.be\/wj_gULGftds\" target=\"_blank\" rel=\"noopener\">Mannaka DEAD END (unknown, 10fu)<\/a>. This song is the opening theme for the anime *Black Summoner*. The second song is <a href=\"https:\/\/youtu.be\/vE6Qj0R9k1Q\" target=\"_blank\" rel=\"noopener\">Down Timer (unknown Vo: O2)<\/a>. This song is the opening theme for the anime REVENGER.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With \u201cNo Reaction,\u201d RetBear now has three songs for anime. The latest information about RetBear is available on their official account <a href=\"http:\/\/twitter.com\/retbear_info\" target=\"_blank\" rel=\"noopener\">X<\/a>, <a href=\"http:\/\/www.tiktok.com\/@retbear_info\" target=\"_blank\" rel=\"noopener\">TikTok<\/a>, and <a href=\"http:\/\/www.youtube.com\/channel\/UCuR2dINjC3ZVRhLT8YrX26w\" target=\"_blank\" rel=\"noopener\">YouTube<\/a> owned by RetBear.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>In a World Full of Zombies, I\u2019m the Only One Who Doesn\u2019t Get Attacked: Main PV<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Main PV for the Anime &quot;In a World Overrun by Zombies, I&#039;m the Only One Who Isn&#039;t Attacked&quot; | Premieres on AT-X in January 2027!\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/ky1EjKvGMrA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>","protected":false},"excerpt":{"rendered":"<p>In a World Full of Zombies I\u2019m the Only One Who Doesn\u2019t Get Attacked premieres in January 2027 with the opening theme song \u201cNo Reaction\u201d by RetBear.<\/p>","protected":false},"author":6,"featured_media":21266,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[162],"tags":[368,232],"class_list":["post-21263","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-anime","tag-music","tag-pop-culture"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" 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