Yaoi - Seke

Kyoutarou Kasuya is an elite businessman who caused a scandal at his company. As a result, he gets sent off to a remote rural area where he meets a weird, unemployed, living off his grandmother's pension neighbor, Yoshiyuki Kuzuya

Yakuza - tragedy. I've read up to vol 2 so far. It has 3 vol in total.
I think they're seke.
Edit: Finished reading. THEY ALL REVERSIBLE

ch. 1-2: CEO kumi and scout manager sakuma using their sex skills in the name of industry and to keep up their business. /
ch. 3: video editor x half-japanese otaku moe-lover but only fucks guys in RL. #threesome with kumi for filming. ./
chap. 4-6: kumi and sakuma's back story #imprisonment #yakuza x 16 y.o. boy. when the boy got older, (time jump every chapter) they started being a reversal couple