Hayami Natsuki is an ordinary college student who lives with his sister. While searching for a part-time job he runs into (another) Natsuki, the manager of a popular coffee shop. Her twin-sister, Hinata, was his teacher, who he once had a crush back in high school. For the sake of the sweet feelings he once had for Hinata, Natsuki ends up taking the job offer at her little coffee shop. He also accepts the offer to live with her. Natsuki starts his new life where he shares the house with a couple more beautiful, attractive members of the opposite sex.

Hinata's sexy twin and their pretty little sister. All of a sudden, he has a new problem: he can't decide which one he wants!!

[From MangaGamer]