A short drama, but an unforgettable one. I definitely recommend this. A tough female lead who has a difficult past. She struggles in life, and becomes an assassin, and a killer. It is a story of a teenage girl, who is also an assassin. The similarity, is the personalities of the two female, they are both silent, and secretly working for bad people.

They both have a similar dark vibe and story. The ambience and the feeling is alike.
However, the male lead in this drama is similar to the female lead in My Ahjussi. He has a tragic past, and he is close to a relative who is disabled, and tries to overcome his hardship, and eventually becomes bad, and tries to get revenge. It's an interesting drama that follows his story, as well the female lead who is also overcoming her own struggles.

If you're looking for friendship and school life, I recommend this. They both have a similar vibe when it comes to chemistry between the casts. This drama is really sweet, and the chemistry between the leads is really cute.