Convenient Semi-Friend

Koutsugou Semi-Friend; Convenient Semi-Friend; 好都合セミフレンド; 方便的陪跑友

"What if we became friends with benefits...?" Suuna, a gloomy high school student, leaves home to live in a dorm. But when she nervously enters her room, she finds her roommate, Ruka, feeling up another girl! She finds out Ruka needs a "friend with benefits," so Suuna takes charge and proposes they form a "(semi) friends with benefits" contract...?