Ep 7. Blue Days ~ Red Switch

Charlotte's birthday is coming up, and everyone is excited to celebrate with her during the school's annual festival. However, things quickly take a turn when it is announced that the festival will be cancelled due to an impending typhoon. Determined not to let the storm ruin Charlotte's special day, Ichika and the rest of the gang set out to plan a surprise party.

As they gather supplies, Ichika finds himself lost in thought about his feelings for Charlotte. Meanwhile, a new student arrives at the school - a beautiful girl named Tatenashi Sarashiki, who turns out to be Rin's older sister. Tatenashi wastes no time in causing chaos and stirring up trouble, much to Rin's dismay.

As preparations for the party continue, Ichika and Charlotte find themselves stranded in town as the typhoon hits. With nowhere else to go, they seek shelter in a nearby hotel. However, things quickly take a turn when Tatenashi shows up and challenges Ichika to a duel in the hotel's pool.

Desperate to protect Charlotte, Ichika accepts the challenge and the two engage in a heated battle. However, just as things start to get serious, Tatenashi suddenly calls a truce and reveals that she was only testing Ichika's abilities.

Back at the school, the storm finally passes and the festival is rescheduled. Charlotte's birthday party goes off without a hitch, and Ichika finally confesses his feelings for her. However, their moment is interrupted when Tatenashi shows up and announces that she will be transferring into their class.

As the episode comes to a close, Ichika is left wondering what kind of chaos Tatenashi will bring to their already hectic lives.