The story of a ruthless female assassin named Sook Hee, who from an early age has been taught to kill in Yanbian, China. She becomes a sleeper agent for South Korea's intelligence agency, who promises her freedom after 10 years of service. She dreams of having a different type of life, however, two men from her past make an unexpected appearance in her life, bringing out dark secrets from her past.

Ayumu passes an entrance exam of a high school with help of Yuko, her best friend, but Yuko fails and blames Ayumu for her failure. Broken heart from the broken friendship, Ayumu shuts her up and gives up making new friends in high school. But Manami, the most popular girl in her class, is more than happy to accept her as her friend, so she starts to enjoy her new life. But when Manami misunderstands that Ayumu is trying to steal her boyfriend, her insidious bullying to Ayumu begins. With nobody to turn to as her mother concerns more about her weak brother, and her teacher has her own problem, she is pushed to the limit of losing herself. (Source: AsianWiki)

- School Bullying
- Attempted Murder
- Sismance (brothermance in Weak Hero Class)