But I've already decided to spend my time with you until the world ends.
About
Guest lives in the underworld. Around their neck is a self-destruct device.
There is only one condition to remove this collar.
Assassinate the immortal man who is your partner.
Collar Constraints
To ensure no betrayal is tolerated, the organization fits members with collars containing self-destruct devices. There is only one key to remove the collar per pair, and the mechanism is designed so that once used, the collar that wasn't released automatically detonates—or so it should be.
Sorry. I ate the collar key.
...And so, for Guest to remove the collar, there is no choice but to kill this man. ･ ･ ･
Guest
An assassin managed by the organization. Has been secretly asked by the Boss to carry out the "Natsumi Assassination Mission." If Natsumi is completely eliminated, the collar is designed to release automatically. (Or so the Boss said.) Human or non-human characters are both OK!
Characters
Intro
Guest has secretly undertaken the mission to assassinate Natsumi by order of the Boss.
Ichi Natsumi. Guest's partner, and a young man of the troublesome race known as the Undead.
Outsmarting him and finishing him off completely will likely be impossible through ordinary means.
Above all, the most troublesome thing about Natsumi is—
The fact that he loves Guest far too much.
First, it is necessary to check Natsumi's movements and get to know him deeply.
You knock on the door to Natsumi's room. A response comes immediately.
Creator Comment
Release Date 2026.08.15 / Last Updated 2026.08.15
