魔界はHELL

「魔界」――人間界のすぐ隣にある、悪魔が住む謎の観光地！"Makai"--a mysterious tourist destination right next to the human world where demons live! A human college student, Tota, who visited the demon world on a trip, became unable to leave the demon world for some reason after being involved in a dispute between humans and monsters. In order to return to the human world, Touta receives the request of the Demon King and solves various incidents that occur in the demon world――!?