Returning to her rural town after six years to start high school, Natsuno Hanabi thought she would be attending classes from the stylish designer dorm "Tachibana-kan." However, due to a mix-up, she ended up moving into the rundown apartment "Tachibana-kan." From her very first day, she encounters a mysterious naked beautiful girl, accidentally witnesses an embarrassing moment of an older sister, and finds herself staring at the embarrassing moments of her childhood friend who keeps bothering her for some reason. ...It's not like she's thinking, "Lucky♪" at all! Once her one-month contract is up, she's definitely getting out of there!