Shintaro Ashzuka

High school student Yoshiro Kobayashi (Mahiro Takasugi) is the great-grandchild of the first president of the Boy Detectives Club. He enjoys time with his friends Watari (Gaku Sano) and Saya (Mayu Hotta). One day, the Fiend with Twenty Faces appears in front of Yoshiro. Mysterious cases then takes place in sequence.

Set several days after "Joker Game". 7 girls, who lost in a game, are gathered at a correctional institution. The girls must now participate in "Escape Game of Death". The 7 girls, who are locked in a room, have to find hidden clues and must cooperate with one another to escape. Because of a trap, the first victim comes out…

Jiro is a 35-year-old NEET who lives with his parents. The sudden death of his father leaves his family broken. It was then that his mother mysteriously leaves his home. Jiro is confused by this and is left with nothing but a small Shiba puppy. The puppy has a small note attached to it, and Jiro ventures out of his home to solve the mystery.