An old Japanese fantasy game that I used to play as a kid

Hi everyone, I need your help finding a game that I truly loved as a child

All I remember is that I played it around 2007 it's Japanese ( It was in anime style but I didn't know anime at that time ) I think it was a fantasy game

The game starts with a scene ( in a castle or a temple ) of a girl attempting to commit suicide with a gun and a guy with a white dyed hair ( the playable character of the game ) who is standing there trying to convince her not to soot herself I guess

she ends up shooting her self and falling to the ground in slow motion then I remember the game starting in a place where you see some weird dark gray or black textured creatures with long snake-like arms ( flexible boneless arms )

that's all I remember at the moment I'll update you guys if I remembered anything else.

Thanks!