Gorya is a low-class girl accepted into a prestigious university attended by the wealthy. The school is ruled by an elite clique known as the F4, consisting of 4 rich, handsome, and spoiled boys. Gorya is the only one that stands up to their bullying ways, leaving all the boys in awe, especially Thyme, the group's leader. Almost instantly smitten by Gorya, Thyme romantically pursues her, but she has no interest in him because of first impressions. She then falls for his best friend Ren, but Ren is in love with his childhood love. In all the chaos of school, Gorya can't help but find herself falling for Thyme because of his generosity to her and her family, and his change of character.

Slipped a fatal poison on her final job, a ruthless assassin working in Tokyo has less than 24 hours to find out who ordered the hit and exact revenge.