Poly

Promising, open (sexual) relationship, seme x seke, uke x chill gf

Walker universe (1) Messy relationship. Affair, seme and uke both sleeping around, can't fully leave each other

Walker universe (2) Continuation of Bun and Daisuke's messy affair

Comedy. The couple each fucked other people (and were quite nonchalant about it), but eventually became exclusive. Light hearted and funny

Chapter 8-17. Photographers, sort of three way relationship. Banker story is also another favorite.

Uke loves to play games with seme and toy with their relationship, so seme ups the game by cucking the uke

Polyamory chapter 1-4
Guy with unrequited crush on his friend was sex buddies with another friend for years, the friend found out about their sexual relationship, 3-way relationship forms

Nao, a university student who lives with his childhood otaku friend, Subaru. Upon receiving rejections of hanging out with his female friends, Nao decided to pick up girls instead. Charmed by her smile, he succeeded. Only exception was that the girl he dated for a day, Azusa, turned out to be a guy. Their relationship progressed smoothly until Subaru stepped in. How will their relationship continue?

Third guy has a crush on uke, seme lets him fuck his uke. Third guy ends up in love with both.