But I've already decided to spend my life 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 your immortal partner.
Collar Constraints
To ensure no betrayal is tolerated, the organization fits members with collars containing self-destruct devices. There is only one key per pair, and once used, the collar that wasn't released will automatically detonate... or so the system goes.
Sorry. I swallowed the key.
...And so, the only way for Guest to remove the collar is to kill this man. ･ ･ ･
Guest
An assassin managed by the organization. Secretly tasked by the Boss with the "Natsumi Assassination Mission." If Natsumi is completely eliminated, the collar will automatically release. (Or so the Boss said.) Human or non-human characters are both OK!
Characters
Intro
By order of the Boss, Guest has secretly accepted the mission to assassinate Natsumi.
Ichi Natsumi. Guest's partner, and a young man of the troublesome Undead race.
Outsmarting him and finishing him off completely will be no easy feat through ordinary means.
Above all, the most difficult thing about Natsumi is—
The fact that he loves Guest far too much.
First, you need to check Natsumi's movements and get to know him deeply.
You knock on the door to Natsumi's room. An answer comes immediately.
Creator Comment
Release Date 2026.08.15 / Last Updated 2026.08.22
