One thing: Chaeheon got the busiest senses. Boy, he's always thinking and is attentive abo...

One thing: Chaeheon got the busiest senses. Boy, he's always thinking and is attentive about Jeong-Yoon. His eyes, always looking for him. He may appear chatting with others but as long as Jeongyoon's with in the range, his sense of hearing works. ... Spoiler..
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Too busy that his mind tend to overthink and misunderstand every little things. Idk if it'll be shown in the manhwa. But in the novel, there's this part where Chae heon saw Jeong-Yoon post a picture with just a small part of a woman caught in the photo and there he thought Jeong-yoon's with some other woman in another country where in fact it's just Jeong-yoon's sister. I mean that's a tiny detail and yet he noticed that then went jealous and mad