An anthology comic of Onii-chan wa Oshimai! by various mangaka. Volume 1 (2021-05-27) Cover Illustration: Namori Color Illustration: Yui Hara, Shiromanta, Bell Izumi 1. 3-bai★Push! (3倍★プッシュ!) [Namori] 2. Onii-chan wa Umitai!? (お兄ちゃんはうみたい!?) [Koume Fujichika] 3. Mahiro to Minority (まひろとマイノリティ) [Natsu Tadano] 4. Mahiro to Keika Kansatsu (まひろと経過観察) [Taku Kawamura] 5. Himitsu no Hand Sign (秘密のハンドサイン) [Masakuni Igarashi] 6. A letter for you [Waka Kakitsubata] 7. Oyama Mahiro wo Kisekaetai! (緒山まひろを着せ替えたい!) [Norito Asazuki] 8. Wasurerarenai Kanshoku (忘れられない感触) [Nekoume] 9. Mahiro to Mahiri (まひろとまひり) [Tsuchii] 10. Mahiro to Imaginary (まひろとイマジナリー) [Misaki Mori] 11. Mahiro to Kyoufu no Misshitsu (まひろと恐怖の密室) [Kometsubu] 12. Mihari to Aibou (みはりと相棒) [Shinichi Yuuki] 13. Mahiro Love Letter (まひろラブレター) [Kina Kobayashi] 14. Mahiro to Dankatsu (まひろと男活) [Suzu Yuuki] 15. Mahiro to Kourei no Are (まひろと恒例のアレ) [Suka] Volume 2 (2022-04-27) Cover Illustration: bb Kuroda Color Illustration: Cool-kyou Shinja Volume 3 (2023-01-07) Cover Illustration: Yui Hara Color Illustration: bb Kuroda Volume 4 (2023-11-27) Cover Illustration: Hiroshi Hiroyama Color Illustration: Hori Volume 5 (2024-09-27) Cover Illustration: Ryou Imamura Color Illustration: Cherry Arai Volume 6 (2025-07-26) Cover Illustration: Muchimaro Color Illustration: Kouhei Shibata, Tsuchii, Ayase Totsuki Volume 7 (2026-05-27) Cover Illustration: Cool-kyou Shinja Color Illustration: Zurikishi