All is well at the Sakuraba mansion as summer approaches. Kaoru is talked into going on a date with Mayu, whose nervousness makes for a hilarious time! At school, however, Kaoru is in a bind! He must finish his report if he wants a summer vacation. This gives all of the other members of the household an opportunity to spoil him with treats and a celebration when he completes his report.

The whole gang decides to go on vacation together, which is a perfect chance for a road trip. When they arrive, who should they bump into but Mayu, on vacation with her family. While there, everyone participate in lots of swimming and frolicking... what could be better?