Koi wa, Hitotsu Yane no Shita de…
恋 は、 ひとつ屋根の下で...
Umi is a high school freshman who has a close relationship with Ryu, her neighbor and childhood friend. She frequently visits his home. When Ryu suddenly moves into a boys' only dormitory, Umi seeks advice from her aunt, who manages the dorm. Her aunt proposes that Umi take on the role of acting manager for a period of ten days.