Blackrose's Questions (2)

I'm looking for a bl manga
The MC and his boyfriend are living together but the MC is older than the bf , when he was in highschool he met the seme while in a fight (I think the seme was in middle or elementary)
The mc was in a gang or something I think but he later became a househusband. In recent episodes the seme's younger brother came to their house to stay

It's quite popular the mmc is gay but the ml is straight and the ml caught the mmc masturbating on his bed(the ml's bed) long story short they began to date