第 7 集: Hiroshi 以俄國音樂破解鋼琴謎題
2016年11月21日 播出
Everyone tries to solve The Piano Puzzle, but after 3 hours, Hiroshi manages to "solve" it, which involves playing Russian folk music on the piano, thus unlocks a game similar to Tetris, which nobody can complete. (Source: Ao Oni Wiki)