A girl falls in love with her twin sister and the show treats it like the most natural thing in the world. There's no performative angst, no tortured monologues about forbidden feelings. Just two people realizing they were always meant to be closer than anyone else. The real shock isn't that it happens, it's how quietly, how completely, the show commits to letting them have this.

Twin sisters Yukino and Kanade Sakurai share a room in their high school dorm, enjoying everyday school life with their friends and with each other. Their routine shifts when Sakuya Kamiyama, an underclassman, starts seeking Yukino out, and Kanade hears from a friend that Sakuya has long admired her sister. That small discovery sets off a chain of events that leads Yukino to recognize, and eventually voice, her feelings for Kanade. The result is a gentle romance and slice-of-life story built around dorm life, school friendships and a growing love triangle.