[3] A man is found dead in an office of the Takayanagi Ballet Company.
At the beginning of the story, Kaga attends a ballet show with an omiai date arranged by his boss.
[4] This is a cross reference to Hiroshi Abe and Yukie Nakama's respective lead roles as Jiro Ueda and Naoko Yamada in the famous mystery comedy series Trick.
Kaga falls asleep and snores aloud during the show, which causes Yamada to turn him down.
TC Entertainment praised the role of the film in the general economy of the Kyoichiro Kaga series.