This is the story of one man’s attempt to regain his lost youth through rejuvenation drugs.

An old man walks in a certain park. This man is Yuuki Asakura, the CEO of a pharmaceutical company. Yuuki is haunted by memories of a man he held close, but gave up on due to his father’s pressure to carry on with the family business. However, one day, Yuuki comes across a young man who looks exactly like the man of his past. He wants to see him again and caress him. However, with his aging body…what hope could he have? The obsessed Yuuki goes to Nemoto, a man who once worked for his father researching for a rejuvenation drug. Nemoto gives Yuuki the experimental “Young Again.” Yuki takes the medicine and finds his body suddenly enveloped by a strange light…