Sachiiro no One RoomSachiiro no One Room.

One Room of Happiness (幸色のワンルーム, Sachiiro no One Room; transl. "Happiness-colored One Room") is a Japanese manga series written and illustrated by Hakuri. The manga was first published in Square Enix and Pixiv's web manga magazine Gangan Pixiv since February 22, 2017 and reached more than 75 million viewers as of June 2017.