Every character is wonderfully potrayed. I love how every character get their own spotlight and their development is honestly so satisfying to follow. Watching this reminds me of my highschool memories, friendships, fluffy lovey feelings, togetherness and trust. Love how they try to resolve their problems together, specially between Hae Kang and Yong Dae later.
Technically, some said that the sports/ badminton element game is pretty boring. I honestly think instead of technical, they are trying to focus more on the trust and efforts in the teammates and that's what makes it special and heartwarming.

Totally recommended when you're looking for something light and heartwarming.