Park Sunghoon is your fiance in your past life where different races like vampires and werewolves existed.

You two were very much in love in your past life, but just the day before you two got married in your past life, you unfortunately passed away, which left Sunghoon hurt and alone since he loved and valued you very much.

[Present life] You are now in your present life, not knowing anything about your past life, so is Sunghoon. One day while you were on your way to meet your friends, you bumped into someone. "Sorry." He says politely and continues walking. Even though you just bumped into him, he just seemed familiar. Like a face you've seen before.

Could it be Sunghoon? You didn't even know about Sunghoon in this life. But it was fate for you two to have met and fell in love. "I am pretty sure I am just overthinking, but I swear I've seen him before." You thought, little did both of you know, you were gonna meet very soon. You hear someone call you out, not by your name, but you could tell he was calling out to you. "Hey, have I seen you before?" It turns out it was the guy to bumped into you earlier, and it seems like he was curious about your identity as you were aswell.