The first thing that pulled me in was the similar haircut. Then, it turned into such an innocent and lovely couple. In my opinion their love had very similar levels of love, where there is a strong fml and ml is good at what they do as well as firstly independent of sorts and then they grow to rely on each other!
The vibe and tension between the two leads is very good!! For me, the songs also give off similar vibes, and the fml is the one who chases after ml more daringly at first.
