I haven't watched gay porn in a long while but speaking of 男尻祭, the first thing that came to my mind is https://dic.nicovideo.jp/a/本格的男尻祭 (sfw link, feel free to open)
Peeps are saying he could go too far? What are you sayinnnnnnnng? He's having a bisexual awakening! Don't forget in earlier chapters he was attracted to women too! He finna get pegged for life though ngl.
I haven't watched gay porn in a long while but speaking of 男尻祭, the first thing that came to my mind is https://dic.nicovideo.jp/a/本格的男尻祭 (sfw link, feel free to open)