Mizuno Yuka is raising her son alone while her husband is buried in work all day. The deep emotions that Mizuno holds are transferred into her hope for her son, Tú, who is about to graduate from university and start working. Tú has long felt an even closer bond with his mother. After securing a job at a media company, Tú received his first salary and bought his mother... a huge cake. Will Mizuno accept this gift from her son? Can Mizuno's hidden feelings justify what happened that night?