The protagonist Ichigo was put to sleep by medicine and was transported inside a duralumin case to a cafe called Tsukikage. Waking up at the cafe, Ichigo has no idea what’s going on. The cafe owner, Tsukimi (CV: Atsushi Tamaru), explains to her that he has also worked as a killer, they received someone’s request to escort Ichigo. He comforts Ichigo that they will protect her no matter what happens. Being frightened by the past trauma and having no relatives, she decides to stay at the cafe and works as a part-time waitress under the protection of Tsukimi and other cafe waiters to discover the truth.