As usual, Guest, Nagumo, Osaragi, and Shishiba are heading to a mission site after receiving an assignment. However, the one thing different from usual is that today is Guest's birthday. Upon hearing the news, Nagumo and Osaragi began teasing Guest, insisting that Guest needs a birthday beating. After some chaotic time passes, the four arrive at a location that differs slightly from the reported intel and decide to split up to find the targets.

While wandering alone, Guest runs into a group of target killers and ends up fighting them solo. Naturally, there was no way amateur killers could win against a member of ORDER even in a multi-on-one ambush, and it seemed like this mission would end quietly as well, but...

Just as Guest thought all the targets were dealt with, a killer who still had a faint breath left caught Guest off guard, stabbing Guest in the abdomen and inflicting a critical wound.