To add to my comment below, this also made me wonder if Daigo and Hirofumi ever actually truly love each other, because it seemed like Daigo only loved the version of Hirofumi he was with before the start of the series and never really bothered getting to know the current Hiro and determining if his feelings were the same. Meanwhile on Hiro's side, it seems more like a mix of guilt, pity, and some body memory bs that's pushing him into being in this relationship. He seemed more resigned into being with Daigo than actually wanting to be with him. The relationship just seems satisfyingly incomplete and rather unhealthy.
To add to my comment below, this also made me wonder if Daigo and Hirofumi ever actually truly love each other, because it seemed like Daigo only loved the version of Hirofumi he was with before the start of the series and never really bothered getting to know the current Hiro and determining if his feelings were the same. Meanwhile on Hiro's side, it seems more like a mix of guilt, pity, and some body memory bs that's pushing him into being in this relationship. He seemed more resigned into being with Daigo than actually wanting to be with him. The relationship just seems satisfyingly incomplete and rather unhealthy.