[DL Mate(Izuminoaru)] Sonzai ga Nakunaru Kusuri ～Donna Koto Shitemo Daremo Anata no Sonzai ni Kigatsukanai to Shitara…. Anata wa Nani o Shimasuka? | Existence Erasing Drug～If no one will notice you wherever you are...what will you do? [English] [xinsu]