Since his mother collapsed, Ryuji Hashiba, a high school student, has had to give up his dreams and work to earn the money to pay her hospital expenses. One day, Ryuji finds an unbelievably lucrative ...more

Since his mother collapsed, Ryuji Hashiba, a high school student, has had to give up his dreams and work to earn the money to pay her hospital expenses. One day, Ryuji finds an unbelievably lucrative part-time job, and even though he knows it’s shady, he participates in order to pursue his dreams again. When he follows his employer’s instructions and passes through a mysterious door, an unknown world stretches out before him, and he is suddenly attacked by monsters...!?