It is just another ordinary day for Satoru Mikami. The sun is shining brightly on the streets of Tokyo, and he is in the midst of a discussion with his colleagues when suddenly he gets stabbed by a passing robber. The average 37-year-old corporate worker is now at death's door, and he has only one regret—dying a virgin. Fading out, he is startled by a mysterious AI-like voice reciting commands. Satoru abruptly wakes up in the middle of a strange cave, but something odd has happened: he is now