It's a yaoi where the guys are in college, and the uke is estranged from his family but they are trying to get him to go home for his brothers wedding. The uke had an affair with his brother's best friend when he was younger and since the friend was the son of a major politician he was kicked out of his house.
Sounds really similar to http://www.mangago.me/read-manga/koisuru_boukun/ but I don't think it is...
If this kiss doesn't happen, I swear I'm getting on a plane to Japan to find this sensei to have some WORDS about playing with my heart this way.