Rock was born into a well-to-do but neglectful family in Tokyo. Due to him failing to enter college on his first try, his family lowered their expectations of him and begin to favor his academically capable older brother who landed a job with the Japanese government. Rock was able to enter college on his second try but by then, his family has already cast away all expectations of him, leaving him to do whatever he wants. After college, Rock was able to find a job in Asahi Industries in its resource center as a salaryman. Since then, Rock has lived an unremarkable life as a white collar salaryman working for Asahi Industries until he had his near-death encounter with the Lagoon Trading Company.