It's going to be different one shots centered on one character as they are what is called poison boys. They have been fed various sort of poisons since early childhood and as a result, their whole being is poisonnous, they are mainly sent to subtly and not so subtely kill people, sometimes corrupted, sometimes not. The one shots are centered around their first kill.

Up to now the chapters are :

1. Hongbin

2. Taekwoon

3. Wonsik

4. Hakyeon

5. Jaehwan

6. Sanghyuk