Nanaka reveals what happened to her parents and how they died. Filled with emotion, Nanaka locks herself away in her house for days. Sana uses this time to visit her and get lengthy moments alone with her.
Nanaka realizes that she was wrong in the way she acted and wants to apologize to Sana, but she struggles to admit she was wrong in front of the whole group. Aoi offers up tickets to the amusement park, giving Nanaka the opportunity to get close to Sana.
Desperate to know why Nanaka has been acting so grumpy and not asking for his advice, Sana racks his memories for an idea on how to reignite their communication. He then recalls the postbox they used to use, and he thinks it may help her talk.
Nanaka feels indebted to her uncle, so she practices the Dance of the Sakura Blossoms for the festival at Yatsushiro Shrine in order to make him happy. After her performance, Nanaka gets to have some alone time with Sana to rebuild their friendship.
On his way home, Shu rescues a schoolgirl from a bully. Hinako tracks Shu down and comes to see him every day. Unknown to Shu, Hinako—who is only 10 years old—wants to profess her love for him, but she doesn't know how, so she seeks out advice.
The gang plan a day trip to the river to reminisce and help mend the rift that formed between Nanaka and Sana while he was away. Nanaka becomes jealous when Sana invites Asami, but she soon realizes they all are still friends when gifts are exchanged.
It's Sana's first day of school and to his surprise, he's nominated to be the class monitor. As he explores the school looking for a lost box, he happens across a piano and immediately remembers the song that was a gift to him many years ago.
Sana returns home after being away for five years. He takes a walk through town to see what has changed since he was last there only to discover that things are pretty much the same. He does notice however that Aoi has grown and not just in height.