Looks interesting. I wanna know too!!
I have no idea (this sounds really interestin though so I'm replying) but maybe search through certain tags like "betrayal" or "lies" or something like that, you might be able to find it
It sounds like this:
http://www.mangago.zone/read-manga/hitsuji_no_kawa_wo_kita_kemono/
Yep that's the one. Thank you
No problem ♡
Anyone know the name of this yaoi/bl please !, so this guy is getting married with the uke's sister and for the marriage the seme and sister have a marriage bank account. The seme gets along with the uke and then sleeps with him and then he takes the money from the wedding account and disappears basically scamming both the brother and sister. The uke then wants to get back at the guy