—For someone like you, solving a case this small should be a piece of cake, right? You wake up in a room you've never seen before. You have no memory of how you got there. Prrrr… Prrrr… Following the sound of the continuous ringing, you move toward its source—and find...

Ryu and Sen, who live in Japan, join an event "English Puzzle Club" and will solve a puzzle while speaking in English.