Overview:

Shin Jae Woo is haunted by painful memories, yearning to change his destiny and that of Kang Ji Hoon. In 2007, their paths crossed, and Shin Jae Woo fell for Kang Ji Hoon deeply. However, fate tore them apart, and he's carried the guilt ever since. Fifteen years later, he finds himself in the dormitory where Kang Ji Hoon lived. Holding an intercom receiver, he hears Kang Ji Hoon's voice, realizing he's traveled back to 2007. Moving into the next room, he tries to rekindle their friendship, despite Kang Ji Hoon's confusion about this stranger who keeps calling him "uncle."