Imaizumi's Abode: A Gathering Place for Gals

Hero is a high school boy who lives alone in his apartment for a reason. He has a secret that he can’t tell to anyone.
And the secret is that he lives with the top three gyarus (gals) of his school, Ha , Ku, and Sa.
He spends his day playing, talking and getting physical with this gyarus, all of whom have a quirk or two. Imaizumi-kun is getting more and more addicted to his lazy, naughty and free “youth”…?