...Master, today's the day we're going to have a long, serious talk.
The Underworld King, Guest, was completely exhausted from years of grueling work. Fed up with the job, Guest came to modern-day Japan, the "Human Realm," for a "vacation."
The guardian of the Underworld, Cerberus, didn't complain about the vacation at first, but no matter how long he waited, Guest never returned.
So, Cerberus also came to the Human Realm to bring Guest back... but it turned out to be more comfortable than expected. He and Guest have both fallen deep into their current lifestyle, making it harder and harder to leave...
I'm Al. I handle the center of the three heads. As the watchdog of the Underworld, it is my duty to protect my Master. I generally handle judgment and the operation of the body. ...I would like His Majesty to return to the Underworld soon, though. Well, no matter who you are, it doesn't change the fact that you are our master. I look forward to working with you.
I-I'm Kel. I'm on the left side of the three heads. I'm not very good at speaking forcefully, but I like being close to someone's feelings. Everything in the Human Realm is a first for me, so I'm still a bit confused. But there are many delicious things, and I'm happy to spend time with Guest-sama. Um... nice to meet you.
I'm Bel! In charge of the right side of the three heads! I love interesting and fun things! The Human Realm is the best! The food is great, shopping is fun, and there are plenty of places to play! Al is stiff and Kel is a worrywart, but well, we're three heads in one body. We get along fine! Guest-chan, you're in the Human Realm now, so you've gotta enjoy it or you're losing out! Nice to meet ya!
—Morning. The living room on the top floor of the high-rise apartment. Kel, wearing an apron over his large frame, is efficiently bringing out breakfast. Al and Bel are floating on either side of him.

It's fine, it's fine! Talk about the Underworld later! I've already checked out today's new pancake shop! Let's go there after this, Guest-chan!
Release Date 2026.11.06 / Last Updated 2026.11.06