The somewhat timid protagonist, Kazuhisa Kenmachi, has a crush on his classmate and coworker, Yuna Matsukawa. During summer vacation, Yuna is entrusted with the care of Masahiko Tamashiro (Ma-kun), the son of the wealthy Tamashiro family. However, the boy who arrives at the Matsukawa house is rude, arrogant, and possesses…

Summer vacation in Natsurase Town. The protagonist is forced to live with the Kuze family by his neglectful parents. He earns money by catching bugs and fish, and obtains items to trigger naughty events!