A to Z

Undercover investigator Matsuzawa Tomoya has a blood-stained past and hidden abilities, working as a private undercover specialized in minor and young targets. His new job Kiryuu Yuuka looks exactly like the man who has been on Tomoya's nightmares for the past 15 years. But the age isn't right and this young man doesn't want to loose contact with him after his time working is up.