Gokujou no Koibito

Gokujou no Koibito summary:

When Kuniyoshi Masahiro meets the new model he's supposed to manage, Suda Yoshimi, he sees a spoiled little rich kid. That is before he notices how attractive Yoshimi really is. Masahiro is a manager at a modeling agency and himself a former model. His newest charge is 16-year old Yoshimi. Yoshimi has looks and charisma to burn, but he’s also an over-privileged, egoistic, bratty teenager. When Yoshimi finds out that Masahiro is gay, he commands his manager to give him extra-curricular instruction in sex between men. But if Yoshimi wants Masahiro to be exclusively his, then he’ll have to surpass top model Akito, his rival in business and in love.