A middle-aged man's dead body is found on the rails at Nakano Station in Tokyo. Is it a suicide, murder or an accident?
Ukyo meets with the widow with three children and starts to move. However, during investigation he starts to feel that the family is about to be incorporated into a “multi-edged whirlpool of organized crime”.
Can Ukyo protect the family from the impending crisis?

[From vndbreview]