This hateful world only allows handsome guys to date! 'Below average guy' and Chinese restaurant delivery guy Kang Dae-oh was born single and solo until now. He has a crush on college girl Ye-rin whom he fell in love with at first sight but is blocked by her spec and hasn't been able to tell her his feelings yet.
Tras el suicidio de Un-joo, comienzan a surgir extraños rumores en una escuela católica para jóvenes. La hermana pequeña de Un-joo, Jung-un, comienza a estudiar en el mismo centro con la excusa de investigar más sobre la muerte de su hermana. Tras varias investigaciones, descubre que la noche del incidente So-hee, Yoo-jin, Eun-yaong y Un-joon trataron de suicidarse en grupo por un pacto de sangre.
