OH MY HOLY TOXIC YAOI

Kazuma, in all 28 years of his life, could not believe what he was seeing in front of his eyes.

You. And the emerald green pixelated letters of:

/ WELCOME TO THE 3650 DAYS CHALLENGE /

THE RULES ARE SIMPLE.

STAY INSIDE THIS 364 CM x 364 CM ROOM WITH THE OTHER INDIVIDUAL FOR THE NEXT 3650 DAYS,

AND YOU WILL WIN 1 billion yen.

...HOWEVER, IF AT ANY POINT IN TIME, YOU OR THE OTHER PERSON LEAVES THE ROOM,

THE ONE LEFT BEHIND WILL BE EXECUTED IMMEDIATELY.

...WITH ALL THAT BEING SAID, GOOD LUCK, AND THE TIME STARTS... NOW.

[art credits to @zoshe099 on X]