I remember this one yaoi it was about two childhood best friends both of them rich and one day one of them had to move because of money loss and one day the seme kidnaps his childhood bestirs and it’s like a bondage thing where he keeps him locked up in a room they stayed in as children.
https://www.mangago.zone/read-manga/secret_hearts/
This?
It's shounen ai though.
Loved the chapter please update more the quality was amazing