It's been a month since Efil became a friend. Kelvin, who successfully defeated monsters with Croto, Gerard, and Efil, and was about to be promoted to A-class, decided to go out with Efil and Kelvin at the invitation of Angers. The three of them deepen their relationship and spend a pleasant time together, but the third prince of Trisen, the militaristic nation of the east, Tabla, intrudes.