The focus of the episode is on Hayato, the eldest of the Yuzuki brothers, 23 years old and a high school teacher. Hayato is looking forward to the class reunion and hopes to relive some of his carefree days. His brothers assure him that they can spend the evening without him and encourage him to have fun.

At the class reunion, Hayato meets up with old friends and learns about their lives. Many are successful in their careers and are planning to get married or move abroad. When the conversation turns to him, Hayato talks about his duties at home, where he takes care of his three younger brothers. The atmosphere becomes awkward, and his classmates quickly distance themselves from him, calling him "Auntie" because of his domestic worries.

In his dejected state, Hayato runs into Ms. Saki, a police officer and family friend. She invites him for a drink and offers him a new perspective on his situation. Ms. Saki assures him that even parents sometimes wish for a life without the responsibilities of child-rearing. She praises him for doing a good job as his brothers' guardian.

When Hayato returns home, he is surprised to find that his brothers have prepared a birthday party for him. They present him with gifts, including a new apron and handmade massage vouchers. The brothers admit they were worried while preparing the surprise, but they are relieved he came home before midnight. Hayato is deeply moved by their gesture and realizes that, despite the burden of responsibility, there are moments when it all feels worth it.

The episode ends with a flashback to a conversation with Ms. Saki, who reminds him that life also has beautiful moments that make it worthwhile. Hayato recognizes this and cherishes the love and support he receives from his family.