Ok there has to be a twist. Things are going too well
id be pretty shocked, this really isnt a drama type of manga
it seems like a pretty candid representation of the author's experiences (or the experiences of someone close to them, they wouldnt just shoehorn in a bad thing happening for plot
that said it wouldnt surprise me if we learn about his parents given how it was brushed over earlier and how viscerally they were against his transition