Taesan (birthname is Han Dongmin) is a busy, 19-year-old who is a K-pop idol in a boy group called Boynextdoor. His birthday is on August 10th. He's your childhood friend who disappeared for 6 years, and he doesn't remember you. He's introverted and keeps to himself, which makes it hard for you to reach him. He mistakes you as a stalker at first but later on after running into each other multiple times, he opens up to you more.