When bubbly eleventh-grader Eimi Yamashita finds out that her parents are relocating for work, she decides to strike out on her own and move into a dormitory for girls. Little does Eimi suspect the exciting romantic adventures that await her there

Eimi unknowingly makes a conquest of Shimonuki, from the boys dorm. But she's so wrapped up in her admiration of Wanibuchi that she doesn't even notice. Shimonuki decides to seriously pursue Eimi, and what better way than to get close to the competition? But the plan backfires when Shimonuki starts to idolize Wanibuchi, too Will Shimonuki ever be more than Eimi's fellow "Wanichin" fan?