Yumi Aoi has always been open about her sexuality, but never her heart. That changes when Ari Fumiko, who she'd developed a small crush on, unexpectedly moves in, thanks to her two chaotic best friends who “forgot” to tell her about the new tenant.

Determined to keep her crush at arm’s length, she tries to build walls. But it’s impossible when Ari shares her school, her home, and—most of all—her relentless desire to be close to her.