Not gonna lie, I am not into the whole teacher x student. On top of that, they're related and one is a minor. I am not comfortable at all with such things so I really hope they wait till the minor graduates. I really like how the teacher/cousin pointed it out too even if it he was just using it as an excuse to deter the minor. Most yaoi don't do that. The art is great and the story is nice too. Definitely waiting for more.
Houtou Musuko to Koi no Ana