Ai Ue, Motto.

In a society of two sexes, Doms and Subs, Ichiya, a college student, has been diagnosed Sub. Feeling aversion to this disposition, he spends his time hiding the truth of his diagnosis from those around him. One day, he runs into an underclassman, Senagi, a dom, and for the first time, he feels an irresistible desire to obey him. Though Ichiya is bewildered by and resistant to the pleasures of obedience, he gently and calmly draws closer to the man who wants him and him alone...

(Source: MangaPlaza)