He seems familiar. IDK from what VN though but I def seen him somewhere before or at least a character that looks very very much like him. / There is some story playing out in the background though, didn't think you noticed. But apparently the MC has history with everyone that is romancable. I think it is important in a way to be romancing them if they have a bigger role to fit in this story, and giving it away to date Tora would mean the story goes nowhere. He is just a side character to help us make decisions at their vacation and make some things work out between the other main characters... Keep searching for other VNs though. I think I saw his twin in another VN that felt very Asian/Japanese as well but that may have been like 10 years ago now.
Yeah, I already know that (When MC can't have Tora numbers) but I still want to put my opinion out cuz why not lol and he still needs a friend (or someone to talk to) after the Morenatsu event. Seeing someone living in the past (or having a hard time) that I can't help them always makes me feel guilty for some reason