Tsumugi Aoba is looking forward to a new life after having experienced a breakup eight years ago with someone she had hoped to be with for the rest of her life.

Tsumugi and Sou are reunited after eight years. However, Sou speaks only in sign language and, for this reason, abandons Tsumugi. Minato, meanwhile, is perplexed to learn that the two have reunited, but he arranges a sign language class for Tsumugi.

Eight years ago, Minato was speechless as he watched Tsumugi and Sou fall in love. But now that he is Tsumugi's lover, his feelings become complicated when he sees Sou reappear.

After having a conversation alone with Sou, Minato realizes that Sou hasn't changed at all, and he is convinced that things can go back to the way they were.

Minato Togawa deeply understands Tsumugi's emotional turmoil, while also harboring complex feelings for her. He then orchestrates a interaction between Sou and his old friends, after breaking up with Tsumugi.

Nana Momono struggles with her feelings for Sou Sakura. When Tsumugi re-enters Sou's life, Nana finds it difficult to accept that her chances with Sou are diminishing.

After a period of intense tension due to two unrequited loves, the atmosphere finally stabilizes. Sou and Nana become closer friends than ever, and Sou shares a heartfelt hug with Tsumugi.

The backstory of Nana Momono and Masaki Haruo is revealed. Nana reunites with him after a long time, and Sou returns to his family.

Sou comes to terms with his hearing loss and lets go of the belief that he is a burden to his loved ones. His relationship with his mother grows stronger and his bond with Tsumugi becomes closer.

Despite his efforts to see things differently, Sou couldn't ignore the fact that he was a hearing-impaired person in love with someone who could hear, and that's constantly reminding him of how much had truly changed.