"A Corpse by Evening", Wrap up for the Kanya Festival between Oreki Houtarou and Irisu Fuyumi. Where one of them concerned about Anjou Haruna's true motive behind the Kudryavka's Order. Will they able to settle the each other's relation through the Juumoji incident?

Strange incident occurred in area of downtown. Inspector Akane and Enforcer Ginoza tasked to investigate but unknown identity made appearance. "Perfect" can be interpreted as "Complete" but there is a fundamental flaw for being completeness. What is the measurement of completeness? What is identity of this unknown figure and their motive?