It's summer vacation, but Soichiro is going to be away competing in a kendo tournament, so the young couple will have to spend the summer vacation apart. Yukino decides to spend the time hanging out with her new girlfriends. Yukino's just getting to know them when Tsubasa announces she's leaving her home. She's upset about her father's plans to get re-married. After some convincing, she decides to go back to her family. She meets her new brother Kazuma, her dad's girlfriend's son, who sings in a rock band. Tsubasa can't help liking him. Meanwhile, the Miyazawas take a trip to see Yukino's father.