Seo In Guk plays a goofball character in this show and he has many opportunities to show off his physical comedy, which I found quite funny. Lee Jong Seok's character is more reserved but his charisma shines through. It certainly felt like he didn't have to try too hard in this movie. Yuri's character is not very fleshed out, and I found her storyline as an aspiring singer to be completely boring and the connection with the swimmers' stories felt very forced. With the little material she had, Yuri's acting still leaves much to be desired. At times she seemed a little stiff, at other times it felt awkward to watch her. The movie also tried to touch on backstabbing and bullying, but it was quite brief and the supporting characters were also not fully developed. Overall, this show is mostly light with some brief moments of gravitas. Enjoy the fanservice, aka abs galore and montages of topless men exercising.