Aww, poor Hiro! So noble of him!

I really liked this take on their relationship, even if Hiro's romantic love is unrequited. (Or maybe especially because it's unrequited? It does have a lot more impact this way, as opposed to them jumping into a rebound relationship or something.) It's also cute that Shuichi cares enough to notice when there's something wrong.

Well, it's been a while since I've read anything from Gravi fandom, but Hiro's always been my favorite, so I'm probably totally biased toward him. I could see this as the jumping point for another story, maybe for how Hiro deals with this situation. There's a lot of potential if you ever decide to write more :D

(Or maybe I'm just trying to con more Hiro-love out of people. Haha?)