1. Bound by Fate

Leo and Sangwon share a mysterious, unbreakable bond tied by a crimson thread, connecting their hearts across time and space. As their feelings deepen, they face accidents, family opposition, and the threat of the bond being severed. Despite the challenges, their love proves stronger than fear or disapproval. In the end, they embrace their connection fully, finding comfort, trust, and passion in each other, their bond unshakable and eternal.