whether a character is "good looking" or not, is more often than not defined by the reactions of the other characters towards them! (since irl people have all sorts of standards for attractiveness)
I personally would not think much of him, since well, he has a generic face, relaxed expression, and very normal features.
and I think the rest of your characters will be drawn similarly. So it's more of a job of the writing and staging, to convey that he is "hot" in your story.
like, think of classic manga
all characters ARE drawn the same way.
but the "beautiful" ones get presented differently.
I was looking for the chapter in nozakikun where they talk about exactly that .. but uhhh here#s some where the attractiveness gets conveyed by comparison and through staging?