No.1 adventure game "Layton Mystery Tantei Sha - Katrielle no Nazotoki File -". Includes 4 episodes in which each episode is a complete story. Kana Adachi sings the intro theme "Change!" written and composed by Yoshiki Mizuno from Ikimonogakari, and Kana Hanasawa sings the outro theme "Daijbu", written and composed by Noriyuki Makihara.