The day of his mother's funeral was in the early summer when he turned 17. That was the same day he met Yashiro Kyouko. During... more>> the days he felt restless, she was the one who supported him. As long as she was there, then he could continue to live. In the peak of summer, the boy was taken away to "paradise." <<less

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... more>> 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...!? <<less