Although Shuri is back to normal and coming to school, Sana notices that Nanaka has started ignoring him again. He follows her to the library after class and tries to get her to tell him why she’s angry, but she claims that she’s not. She eventually admits that she saw him embracing Asami, so Sana attempts to explain that it was an accident. Unfortunately, he makes the mistake of comparing it to when he and Nanaka embraced during the festival, and him saying that there was nothing between him and Asami since it was an accident just makes Nanaka madder due to the implications. It doesn’t help either that Asami comes to thank Sana and invite him to volunteer again at the nursing home. Sana doesn’t give up though, and on the way home, he questions why Nanaka has become this way – she’s not the Nanaka he used to know. In response, she points out that he’s changed too and runs off.
At his apartment, Sana thinks back to his past with Nanaka and how they secretly shared a mailbox that wasn’t used anymore. They had used it to send each other messages, and each of them had a key to the mailbox. Sana tries looking for that key now, though he gets interrupted when Aoi comes into his apartment and panics after seeing all the erotic magazines and manga strewn everywhere. In trying to go after her to clear up the misunderstanding, Sana kicks open a canister that contains the key. When he later takes the key to the mailbox and opens it, he is shocked to find it full of letters addressed to him. Even more disturbing is the fact that there is one particular letter with “Help” written in red ink all over it. Because of this, Sana tracks down Shuusuke the next day and demands to know what happened while he was gone. Shuusuke at first tries to dance around the subject, but he eventually reveals that there was a fire that claimed Nanaka’s parents’ lives three years ago.
Nanaka had grabbed her violin and the bracelet that Sana gave her before jumping from the second floor. She broke her leg in the process, and the shock of the fire caused her to forget certain parts of what happened on that night. The police questioned her, and when she returned to school, Nanaka had become a different person. Shuusuke had been frustrated by how he wasn’t able to do anything, and this thought stays with Sana as he contemplates about what to do. When Yuzuki finds Sana in the playground looking depressed, she gives him a caramel, and this leads to Sana asking why she does that. Yuzuki’s explanation starts with how both her parents worked when she was a child and left her money to buy snacks with. She had wanted her mother to be home and to share the snacks with, but in the absence of that, Yuzuki had to do it by herself, and she preferred caramels because she could get a lot of them.
Yuzuki hadn’t started giving them out to others until high school when she had seen a boy practicing on some horizontal bars in a playground. Though she doesn’t remember the boy’s face, she remembers how happy he had been with the caramel, so she began giving them out to encourage and cheer people up. After hearing this, Sana decides to do his best, and his face reminds Yuzuki of that boy. Although he’s still unsure of what he can do, Sana calls Nanaka to the mailbox and tells her that he saw what was inside. He also reveals that he heard about the fire and tries to apologize for not knowing about her pain. Nanaka, however, lashes out at him for not being there for her during her most painful times and tries to leave, but Sana stops her. Since he won’t let her go, Nanaka at first accuses him of forgetting about her and making new friends, but then she runs to him in tears because she had wanted him to come save her and be by her side. Sana vows that they’ll stay together no matter what, and that night, he talks to his mother over the phone about getting stronger because he’s got someone he wants to protect.
As expected from all the hints they’ve given us, Nanaka was indeed traumatized from the fire that killed her parents. They didn’t cover who the guy in the OP surrounded by flames was, but maybe that was just her father or something. In any case, the letter Nanaka had put into the mailbox with tasukete (help) written all over it in red ink was quite creepy and an effective way to show her unstable mindset back then, but it seems like we’ve been seeing a lot of that kind of stuff lately.
The scene at the end between Nanaka and Sana was just dripping in emotion – almost overly so – and despite Nanaka angry with him for not being there for her, she runs into his arms. I guess that means they’ve made up, and there probably won’t be any more doubts or jealousy over Sana being with Asami anymore. However, that makes me wonder if Asami has a part to play aside from being just the girl Nanaka gets jealous over. I also have to say that Yuzuki’s background felt like it was just tacked on since it didn’t feel very fleshed out and didn’t really impact the story.
The preview shows more Nanaka next week, but it appears that we’ll see more of Hinako in an amusement park setting too. The presence of her and the super sentai bunch makes me think that it won’t be that serious of an episode. Regardless, we’re two-thirds of the way through the series now, and considering the two key shots of the wristwatch that were in this episode, we should be pretty close to finding out the significance of Sana’s wristwatch (aka. if he slit his wrists like everyone thinks he did).