Seiya disappears into the sea as a time bomb explodes. Ryosuke, realizing his fate, vows to take revenge on Seiya and starts following Yuki, the most suspicious of all. However, Yuki disappears near a cabaret called “Parry” as if he sees through Ryosuke's movements. Meanwhile, a returning Kindaichi boy brings a dancer who looks exactly like Seiya, dressed in a flashy fashion. The man's hobbies and tastes are completely different from those of Seiya. Ryosuke learns that the man dances in “Parry” and becomes interested in him. The drama soon takes place on a luxury cruise ship sailing from Yokohama. Who is this man who looks exactly like Seiya? Is Yuki an enemy or a friend? Will the owner of the office reveal himself? And what about Seiya Takano, the eater of food? A lot of highlights! A 15-minute extended final special full of tears and laughter.