Responses
http://www.mangago.zone/read-manga/sayonara_game_minaduki_yuu/
I think is this one! Is one of my favorites :)
Thanks
A yaoi manga, there are two episode, seme has sister, and he found a tutor for her. The tutor is uke, he really like seme that he agreed to teach her. Then sister fell in love with uke... but uke confess to seme.. n seme slowly developed his feeling.. in second story they live together