A teacher comes to an island to teach while staying at his former professor's house.

When he arrives though the professor is gone and he is expected to live alone with just his high school daughter Aoi and a cat.

Honoka Aono is an attractive 17-year-old high-school sophomore. One summer day, suitcase in tow, she arrives at Musashi Koganei Station. A little away from this station, deep in a quiet suburban town, is the apartment her grandfather built. That's right – starting today, Honoka is going to be a landlord.
Wearing her sailor school uniform by day and her landlord's apron after school, Honoka sets out to manage this building... which happens to be home to some very beautiful women. What kinds of heart pounding, exciting adventures await Honoka?

Nekota and Hoshino were always arguing at school, but in reality, Nekota actually has a crush on Hoshino. One day, he finally gets up his courage to tell Hoshino his true feelings, but she rejected him with mixed feelings. Feeling sad, Nekota goes home to find that his dad is remarrying another woman, but the catch is that Nekota has to live alone with the woman's daughter while the two parents go to Europe. The daughter of the woman, however, is Hoshino... What will happen between the two while they live together?

Poor Mugi Tadano! Heartbroken after his girlfriend moves away, he takes a summer job at his friend Kazuki's beachside snack bar/hotel on a tropical island. It seems like the perfect plan - until he meets Yuu, who might just be the cutest person that Mugi has ever seen.