Kanjou o Nakushita Shoujo to Haibyouin Kara no Dasshutsu

When I woke up, I found myself in a hospital. Why I'm in such place... I don't remember anything. I shrike when I find an arm which is Skeletonized. ... No, it's just a normal arm. My head aches, I feel like something important is missing from my memory... Ah, I have to search... I have to search and find her... ... Who's she? But I have to find her anyway... I open a door of a sickroom... After overwhelmed by intense light, there appears a hospital turned into a ruined building... I have no idea what is going on... But I have to find her. She's only... Escape from her... The only hope. I... I should protect her... Guess I'll soon find her in a sickroom over that corner...