Mystery novel and Escape Game [The Prison Boys]!

Mystery novel + Escape-game [Challenge the prison in the underground of the Empire] [ The Prison Boys ]+ You will like it +* If you like mystery, quizzes and solving problems. * If you like free apps about quizzes and riddles. Please include a note to warning of possible spoilers.[TERMS OF SERVICE]https://se-ec.co.jp/smartphone_app/RulesOnUse.html++++++++++++++