Convenient Semi-Friend manga volume 1 features story and art by Minori Chigusa.

Suuna is a gloomy high school student with a huge problem: She has no friends! Hoping to remedy that, she leaves home to live in her school's dorm. But when she nervously enters her new room, she finds her roommate, Ruka…feeling up another girl?! Is that what friends do?! Though inexperienced, Suuna's ready to take her first steps toward getting to know her scary roommate and, at the very least, becoming something like semi-friends—with “benefits”!