
It's not yaoi. I think it was a romance seinen. It's about a young couple who had just moved in together, but were not married. I remember they were happy but slowly things start to cool off. He ends up cheating on her (with his student, if I remember correctly) and in the end they break up, he tries to get her back but she refuses.
Thanksss :))
our little mo is in the process of Realization give him a minute