After returning from their seaside trip during the first semester break to practice for the Hot Wave competition, Tinn and Gun's love for each other has blossomed. However, a secret is a secret, and they still can't tell anyone they're dating. As the second semester begins, they promise to keep their relationship a secret until the Hot Wave competition ends. However, things don't go as planned. Tinn and Gun's friends constantly suspect their relationship, leaving them with little time to be affectionate. Moreover, Gun has never once said the words "I like you" to Tinn, leaving Tinn to doubt how much Gun truly likes him. Although Tinn desperately wants to hear those words, the situation does not allow for it. How will they manage to maintain their relationship until the Hot Wave competition ends?