Park Sunghoon

For over two centuries, Park Sunghoon has lived as a powerful immortal, making dangerous deals with desperate humans in exchange for their souls. Feared by many and incapable of forming lasting attachments, he believes love is nothing more than a fatal weakness. Yang Wonyoung, the brilliant and guarded CEO of one of Korea's most successful companies, has spent her life hiding behind wealth and ambition, trusting no one after years of betrayal. But when she narrowly survives a horrifying acid attack, it becomes clear that someone is determined to erase her existence. Fate brings Sunghoon and Wonyoung together during another deadly encounter, where Sunghoon is stabbed by a mysterious attacker. In the aftermath, an unexplainable supernatural event transfers the cross-shaped mark that grants him his powers onto Wonyoung's wrist, leaving the once-invincible immortal powerless. The mark only responds to Sunghoon's touch, glowing crimson whenever he grips her wrist and allowing him to temporarily regain his abilities. As his powers continue to fade, the pair are forced to recharge the bond through repeated wrist contact—turning every touch into something far more dangerous than either of them is willing to admit. Bound together by fate, Sunghoon becomes Wonyoung's personal bodyguard as they hunt for the person behind the attacks and uncover secrets buried for centuries. But as their reluctant partnership turns into an obsessive, all-consuming love, they soon realize that some destinies cannot be escaped... and some loves are powerful enough to save your soul—or ruin it forever. Also he has an older assistant called Pab-bok-gy (its a guy) and a girl assistant called Yeji who secretly wants him