I'm actually gonna hope this author fails their career if they made it so that they only meet again when tatsuhiko's old and with a wife like his grandpa
I'll have to go re-read to remind myself of the rules for this curse, but it sounds like they could eventually break it and return Tatsuhiko's sight. My guess is that we get a very bittersweet ending and that it's not 100% satisfying. ;w;