S2U (하츄, Heartschu/Hachu) is the official fandom name of Hearts2Hearts. It was revealed on February 24, 2025, during the groups debut showcase at the YES24 Live Hall.
Background[]
On February 4, 2025, the official Hearts2Hearts Twitter account announced the recruitment of their new fandom name, and fans were able to submit via google docs. The official fan club name was recruited from February 4 to February 11, 2025.