Seungcheol, the leader of SEVENTEEN, is exhausted after years of fame and decides to take a break. On the recommendation of his bandmate Vernon, he joins Conaeon, an app that connects people anonymously through text. There, he matches with @yfoxorcat, a mysterious user who, like him, craves real connection without the pressures of identity. As they converse over 100 days, a deep bond forms, giving Seungcheol the solace he desperately needs. But when the anonymity ends, they must confront the truth of who they really are - and what it means for their fragile connection.