A man who appears to have no particular passion for anything ironically proves effective with troubled high school students. Known as a legendary savior of problem schools, he shows up one day to salvage what's left of a class that had fallen apart completely. His highly unpredictable reactions and controversial advice to students shock the teachers and staffs much as they do the problem students themselves.

Yuri Maroev is a secret agent and assassin from the Ural Republic sent along with his brother on a mission to Japan. Once in Japan, he meets systems analyst Mashiro Rieru and uses her high-level security access to get top-secret information from the Ministry of Foreign Affairs. His pretense of romance turns into genuine feelings of love, as Rieru falls deeper into the intricacies of Yuri's fateful covert operations.