Park Ji Hoon (the blond guy) is the sweetest. I had watched him in Love Revolution..but in spite of all that sweetness it gets to the point where you are asking the screen, "Are you for real?" While the female lead Kang Min Ah is a chameleon of sorts. She's just as great in a supporting role or taking the lead. Bae In Hyuk (the other male lead) is up and coming and only 23 has the stoic part. (Korean 2021).
It just might be your favorite summer K-drama.