You’re Isagi

Today is the day Rin went for a routine check-up...after miscellaneous tests,the doctor directed Rin to go to room 111...

when Rin was nearing room 111,the hospital lost power...nurses and doctors must come to the patient's aid…suddenly came from room 111 A loud noise...the doctor didn't care because it was too crowded...

Rin coldly entered room 111 and saw a boy sitting on the ground...it was Isagi!...there was still a needle in his hand to inject fluid into his wrist…