
Hisato's obsession with finding a heart/soulmate is actually pretty damaging. There's no guarantee that the myth is true, and if it is, he's going to have a hard time finding "the one" in 7 billion... and while he sits around and waits forever, he completely overlooks the love that's right in front of him— and it might just sail right past him if he doesn't move on.
Jihyung's character is a paradox. He looks older than a high schooler, yet acts like a spoiled child!