Top wants to go back to his childhood home to fuck his cousin who he thinks is a woman but is actually a man and after walking in on his cousin he realizes he's attracted to him even though he's a man and falls in love with him and tries to win him over but bottom cousin is reluctant because they are teacher and student, cousins, both men, minor and adult, and in the country where it's not accepted
Houtou Musuko to Koi no Ana