Niku is just a broke collage guy who has no money to pay his debts because his friend never payed him back.

Niku was devastated as he was laying on his bed not knowing what to do until two men in black suits rang his doorbell and Niku immediately answered. Without asking they offered him a job that pays well and told him to sign the contract paper and he signed it without reading it. He's just happy he has a job.