An anthology comic of Onii-chan wa Oshimai! by various mangaka.
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Volume 1
Cover: <a href="https://mangadex.org/author/f049cee3-3b14-4101-8e5d-813526abb1f6">Namori</a>
Illustrations: <a href="https://mangadex.org/author/60f69905-13da-42a5-9b2f-0571fcd567c2">Hara Yui</a>, <a href="https://mangadex.org/author/465b6513-a230-4ce1-b2a9-5027e94e52cc">Shiro Manta</a>, <a href="https://mangadex.org/author/1f462d2f-2cd5-420e-9f07-b4a214ef9465">Izumi Bell</a>
Author list:
<ol>
<li>Namori</li>
<li>Fujichika Koume</li>
<li>Tadano Natsu</li>
<li>Kawamura Taku</li>
<li>Igarashi Masakuni</li>
<li>Kakitsubata Waka</li>
<li>Asazuki Norito</li>
<li>Nekoume</li>
<li>Tsuchii</li>
<li>Mori Misaki</li>
<li>Kometsubu</li>
<li>Yuuki Shinichi</li>
<li>Kobayashi Kina</li>
<li>Yuuki Suzu</li>
<li>Suka</li>
</ol>
Volume 2
Cover: <a href="https://mangadex.org/author/b8327a2b-a285-4a9a-b124-f3be558741d1">Kuroda bb</a>
Illustration: <a href="https://mangadex.org/author/9df2ffe2-1b7f-4619-93e1-c97aa0f1c0d0">Cool-kyou Shinja</a>
Author list:
<ol>
<li>Namori</li>
<li>Hara Yui</li>
<li>Tadano Natsu</li>
<li>Igarashi Masakuni</li>
<li>Okada Anmitsu</li>
<li>Yuuchi Mikumi</li>
<li>Adachi Imaru</li>
<li>Onio</li>
<li>Minamito</li>
<li>Tomoe</li>
<li>Tsuchii</li>
<li>Terai Akane</li>
<li>Rucchiifu</li>
<li>Moricocco</li>
<li>Ouchi Kaeru</li>
<li>Nekoume</li>
<li>Cool-kyou Shinja</li>
</ol>
Volume 3
Cover: <a href="https://mangadex.org/author/60f69905-13da-42a5-9b2f-0571fcd567c2">Hara Yui</a>
Illustration: <a href="https://mangadex.org/author/b8327a2b-a285-4a9a-b124-f3be558741d1">Kuroda bb</a>
Author list:
<ol>
<li>Namori</li>
<li>Yukimoto Shuuji</li>
<li>Igarashi Masakuni</li>
<li>Suka</li>
<li>Onio</li>
<li>Sasuke</li>
<li>Toyobayashi Sakane</li>
<li>9℃</li>
<li>Adachi Imaru</li>
<li>Sorato Shunsuke</li>
<li>majoccoid</li>
<li>Yuuchi Mikumi</li>
<li>Hami</li>
<li>Tsuchii</li>
<li>Hori</li>
<li>Cool-kyou Shinja</li>
</ol>
Volume 4
Cover: <a href="https://mangadex.org/author/65ea7bec-52aa-4b19-aabe-5f1d41683291/hiroyama-hiroshi">Hiroyama Hiroshi</a>
Illustration: <a href="https://mangadex.org/author/fe546044-b115-43ee-9ef8-2e2c81e110f7/hori">Hori</a>
Author list:
<ol>
<li>Namori</li>
<li>Asazuki Narito</li>
<li>Tokita Shigure</li>
<li>Sorato Shunsuke</li>
<li>Fukuoka Tarou</li>
<li>Onio</li>
<li>Kamaboko RED</li>
<li>Ceramic (Seramikku)</li>
<li>Tsuchii</li>
<li>Ronna</li>
<li>Kakitsubata Waka</li>
<li>Dobato</li>
<li>Zinbei</li>
<li>Hatoboboko</li>
<li>Cool-kyou Shinja</li>
</ol>

Read the comic Onii-chan Is Done For! Official Anthology Comic online, along with others like The Greatest Estate Developer, After Ten Millennia in Hell, Revenge of the Iron-Blooded Sword Hound, SSS-Class Revival Hunter, The Return of the Disaster-Class Hero, Return of the Blossoming Blade, Kaiju No. 8, Chainsaw Man, Player Who Returned 10,000 Years Later, One Piece