Soooo I get Kang Lims point. But honestly, I kinda root for the 1st girl, his friend from the get go (sorry, terrible with names ><). And in a way, I'd find it aweful for her if he kept being in this world in the end - depending how things are on "original earth".
If it's like in some isekai & it's like he never even existed... Yeah, I could stomake that one.
But if it's like she, in the original world, still remembers him (or he's like in a coma or smthg), that'd be kinda meh. Even more so if he'd go and choose anyone but her in this world.
Though in this one I kinda like all of the heroines (more or less), so it'll be meh in one way or another either way xD