My Beast Son's in Heat

One day, Shizuka picks up a beast child he finds abandoned in the water. Naming the child Kojuro and raising him as his own son, he had originally thought of raising him for money, but now he's truly come to think of him as his own family.. What will he do when full-grown Kojuro's feelings for him grow less and less familial by the day? (Source: Futekiya)