"I had sex with Mr. Kanai." Akane's bombshell lights a fire in Hanabi, and she vows to fight back. Meanwhile, she tries to go back to being friends with Sanae, but...

Summer break is here. Hanabi and Mugi both decide they will confess their feelings to their crushes after they complete their summer homework assignments. They are beginning to realize that they can no longer view each other as 'replacements' for their crushes as the time to confess their feelings draws near.

Mugi is her student since her tutoring days. Narumi is her colleague she only became interested in after she discovered Hanabi's feelings for him. Both men have fallen for Akane, but she still feels unfulfilled.