Because of the popularity of the Isekai genre stories on a planet called Earth.
The people being summoned into another world have started to become bothersome for the gods.
When 28 students were summoned into this alternate world and become heroes to save the world from the demon lord.
The gods wanted no part of it and decided to just reincarnate into the world to have a vacation and have a GOOD TIME.
Yes, "Having a good time" or should I say "using the heroes to have a good time" as the proper term?
Will the 28 students be able to survive in a world where the gods themselves might become their enemies?