Five young men participate in an experiment drug test, which is known as a short-term, high-paying part-time job.

Minoru falls ill with a heart ailment, but luckily finds a donor and undergoes a transplant. However, after he has married his co-worker and had a child, he discovers that the blood infusion received during his transplant was contaminated with HIV.

Minoru is diagnosed with cancer and undergoes surgery, but it is soon discovered that the cancer has spread to his lymphatic system and he is prescribed anti-cancer drugs. He is soon plagued by severe side effects such as vomiting, skin rash, and hematuria, and begins to distrust hospitals.