
Ok, I don't know how old you are and how much you know about non-heterosexual relationships, so I'll give you this summary of what happens in real life, and in comics/manga.
IN REAL LIFE:
- You don't ask who's the man and who's the woman, that would be rude. You don't ask people their roles in bed either.
- In a gay relationship, both would be men and in a lesbian relationship, both would be women. There's some nuance with non-binary people but we won't get into that right now. There are stereotypes in comics where one needs to be macho man and the other cute smol uwu, but in reality, both can be masculine, both can be feminine, the shortest and cutest one can be the top, the bigger one can be the bottom, and a lot of guys in the community like changing positions, actually.
IN MANGA:
- USUALLY the shortest and/or prettiest one is the bottom. It's a tired trope that comes with the idea that one "has to be the woman", and that taking it up the ass is "the woman's role", this is luckily changing but it's pretty slow.
- In this manhwa in particular, they're minors. It's true that sexual relationships are still depicted in comics when they're high schoolers sometimes, but this art style in particular is too innocent, the story itself is too wholesome, and they're drawn in a way that honestly makes me feel icky as to know which one is the top and which one is the bottom.
- If you're still curious, the author answered that question...with Mi-Rye and Kyungbin, in which the former is the top. The author revealed that in the first season's epilogue (that's not here, just in the raws), and I don't know why, honestly, because in the same breath they also said they wouldn't draw any +19 stuff so, that's that.
Wait wait in the side couple who's the dominant one? I'm not saying like inappropriate, I'm saying who's the boyfriend