
It’s not just the way the Seowoo looks, it’s the way he acts. He acts very childlike, in spite being an adult. So that, on top of his appearance, is really uncomfortable.
The size difference is similar in Sign, but Soohwa clearly acts like an adult, an immature one, but an adult nonetheless. And it doesn’t feel like there’s a difference in maturity between Yohan and Soohwa, unlike with Seowoo and Reaper.
So I don’t think the comments are wrong to feel weird about this.

Love to see Haesol finally being more assertive towards Yeonwoo. He needs to see that he doesn’t have to go through this alone. It doesn’t have to be just him & Junhyuk against the rest of the world, like it was in middle school. There’s more people who care about him and will do anything to defend him now.
Just got caught up and let’s just say I’m glad I ignored those comments about this story being boring.