After his parents passed away, Haebom began to live in Taesung's home. The two of them weren't on intimate terms with each other, in their junior year, they were divided into the same class, which embarrassed Taesung a lot. Living together for 24 hours every day, they brought change to their relationship... The feelings that couldn't be hidden gradually came to light. Although they have mutual affinity, they have to keep a distance from each other, a lovely and sweet love story thus begins...