Yuuhi fakes being sick so Jun'ichi will stay home from school to care for her. That's when she demands a redo first kiss. Everything seems ready to fall into place, until Minato takes the chance to drop a bombshell announcement.
For summer break, Jun'ichi and the group head to one of Ayanokouji's family's privately owned islands. But, the school president has a secret plan to make this vacation as, um, interesting as possible.
Juvenile delinquent Jun'ichi rescues pretty Yuuhi from two troublemakers. The next day, she shows up in his class, where he attempts an awkward kiss. Things get more awkward when Yuuhi appears at Jun'ichi's house later ... as his surprise fiance!
After learning the details of their arranged marriage, Jun'ichi and Yuuhi are having a weird time adjusting to living together, and Yuuhi may just spend spend her first night sleeping on the couch.
After Jun'ichi came back home after meeting his parents, Yuuhi was so angry over Jun'ichi lying to her that she decided to break up with him and leave the house that night. The next day, Minato left the house as well in order for Jun'ichi to make a decision between her and Yuuhi.