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.

Satou is holding a trash bag covered in blood. She tries to throw it away in the river, but senses someone nearby. The next day at school, the class president, Kitaumekawa, worries about Satou and tries to talk to her. Meanwhile, Asahi is handing out flyers around town looking for Shio.

When Asahi gets attacked by a group of thugs, Satou and Mitsuboshi protect him. Satou senses that Asahi and Shio are connected to each other through a special relationship, and is almost overcome with anger. Meanwhile, Shio starts to worry when Satou is late coming home, and leaves the apartment to search for her around town at night alone.

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.

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.

Satou and Shio spend their last night in Apartment No. 1208. The two girls wear matching rings. Satou tries to bury everything so that they can enjoy a brighter future. Meanwhile, Asahi has something he has to tell Shio, and searches for the two girls.