Greetings and thanks for the interest

Having finally caught up with Rumiko's Rinne, I am looking for a manga where, just like in that manga, every character, or most at least, is a total scum. I know Rumiko tends to play with that theme a lot. I found a few if suggestions looking around, but none close to a MC who will abandon you for 10¥ unless her equally trustworthy love interest is watching.

Thanks again.

grand blue mang. definitely grand blue

Shuumatsu no tenki. Every one was selfish as hell in this manga.

Sunabozu, definitely.

Ajin has a lot of incredibly self-centred characters, including the protagonist.

Overlord (Novel). It has manhua and anime adaptations, if you prefer those. On that note, a lot of Chinese novels and their adaptations would fit. Chinese fiction has a definite thing for extreme selfish a-hole casts, imo. (One of the reasons I avoid it like the plague)

Funouhan. There are some good guys, but they usually suffer horrible ends anyway.

The Selfish Protagonist category tag has some good titles.

Ore wo Suki Nano wa Omae Dake ka yo is about a scummy guy trying to engineer a harem comedy for himself while all the girls are selfishly trying to use him to get with someone else. Only his best friend isn't a scumbag but otherwise everyone has no problem using someone else as a stepping stone to their love interest.

Thanks for the answers, I'll make sure to check them out eventually.