This looks really good, I am impressed by the title screen and the save/load structure.
The only thing I find weird is Rou's looking forward sprite, the head feels detached. I can see that the neck adjusted accordingly, but I think the head is a little too low, like if I were to mimic it in real life I would have to crank my neck real forwards. And maybe the head could be a little more to the left(player perspective)? Like how if you look to the right your head would usually lean a little towards that direction. Or maybe all this is intentional because he is looking straight at the MC?
Anyways, can't wait for more. Keep up the great work!