If you exchange the genders of the leads, this is the typical childhood friends turned into lovers trope.

Their parents were best friends and neighbors. They promised each other that if their children had the same sex they'll be sworn siblings and if different let them marry. The catch? FL was born seven years before the ML. So by now you can guess that the main conflict in the drama is a society that looked down on older female-much younger male relationships.

I really liked that drama showed us flashbacks of the leads' childhood. The FL took care of the ML when their parents were busy, saved him when she thought he was bullied, basically treating him as just a younger brother. The ML on the other hand, worshipped the FL, obeyed her in everything and considered all her words to know how to please her.

The FL kept failing in relationships while the ML just looked on waiting until she finally notices him but she never did. He then went on to study abroad to become more competent and attractive. When he returned the virginal ML kept seducing the FL until she finally gave in. I really can imagine this as if their roles were reversed. A big brother taking care of his so-called sister who in turn is very obedient and tried to become attractive, then because she had a crush on him, pretended to be helpless and seduced him. See? Typical.

The real conflict in this drama is that the FL felt like she was a cradle snatcher if she will have a relationship with the ML. Once she got over this thinking, their relationship stayed strong amidst worried. I was satisfied to see that the main CP has enough people who are close to them supportive of their relationship. The people who matters.

I could not give this a perfect rating because I would have liked to see more growth in the leads, more reasons to see that they are an OTP but overall this is a fun watch which though typical was not that cliched.