Fascinated By The Troublemaker
The female lead, She secretly followed him wherever he went out of curiosity. The longer she follows, the more she learns about the male lead, which, out of curiosity, leads her to think that she and he are destined for each other. The more she kicks herself involved with the male lead, the more she develops her feelings and falls for him.
Through encounters, the troublemaker develops feelings for the female lead, but is unable to convey these feelings to her because of the difference in their identities and belonging to different time zones.
The villains, who have been hiding out, now learn about the presence of the female lead and how crucial she is to the bloodsucker; as a result, they want to meddle with her and kill her in order to turn the male lead into an evil criminal and achieve their aim of destroying the world. Together, the male lead and female lead fight the antogonists and stop the world destruction with the aid of their friends.