Cousins
Step brothers ch 1-3
Bro x bro, forced sex in the beginning
Father x Son (Actually threesome with the other son, so also Brother x Brother) - Chapter 3
twisted
incest (twincest), 3p
Rape
manipulative semes /extremely submissive uke
The uke gets manipulated by his brothers the whole time.
son × father (no blood related, but he raised by him and call him dad)
Brother x Brother
Ch 1 -2 brothers
Brothers
Katsubou no Manazashi