Dark Dash, in short DD, is an ESP power that only shows its true face at night or in the dark. When activated, a certain part of one's skin is turned dark grey. How much and wide it turns into dark grey determines how strong the DD user is. And it appears there are many people who have this DD power. This caused DD users to form a group. There are people who wish to abuse their given power. Sheiha who turns his whole body into dark grey has gathered DDs and built a company that looks like a normal company (STAD; Special Training Association of Dark Dash) from the outside but does killing from the inside. Their job is assassination. STAD also owns a large and famous private school which STAD finds most of its DD users. The main character here is Tenka, the boy in the above image. Tenka has DD power. And Tenka's whole body turns black, which is stronger than dark grey. But he has been hiding this since he had no knowledge of Dark Dash. One day, Dr. Suoh approaches Tenky knowing he is a DD but not knowing he is the most powerful DD ever born. Dr. Suoh is anti-STAD as he is against STAD for murdering people. and there is one more person who is with Dr. Suoh. Her name is Lenong who loves Sheiha and Sheiha also loves her. But Lenong ran from Sheiha as Sheiha once attempted to rape Lenong.