Shoko is surprised to hear that Satou has decided to give up fooling around with guys and start living together with the person she loves, a mysterious girl named Shio. Satou starts working more to cover the expenses of her new life with Shio. However, an incident happens at her new job.

Shoko starts to get suspicious about Satou, and runs into Asahi passing out flyers. Satou says that she has to go to Mitsuboshi's place to deliver a notebook with a message from work, but when Mitsuboshi opens the notebook, he finds a message asking whether he wants her to let him see Shio.

Satou gets Mitsuboshi to agree to help her by offering to let him see Shio. Mitsuboshi contacts Asahi and tries to get him to leave town to get him away from Shio, but Asahi gets suspicious. That night, Asahi reveals his feelings for Shio to Shoko.

Shoko had sent a photo of Satou and Shio to Asahi right before she was killed. Asahi captures Mitsuboshi and forces him to reveal the location of Satou's apartment. Satou makes a vow to Shio to fight together, and heads to Apartment 305, where her aunt lives.