Why did I have to fall in love with my roommate? Takasora Hoshi's life is upended when her schoolmate Umi Mizuike and her mother temporarily move into her family's cramped apartment. From the outset of this arrangement, Takasora is annoyed by Umi's behavior...and her good looks. Though the two girls initially agree to avoid interfering in each other's lives, Takasora can't help but start to wonder where Umi keeps wandering off to at night...From the author of Adachi and Shimamura comes the bittersweet tale of two high school girls whose lives are pushed together under the same roof.