A mishap with a summon traps the characters in other games made by Happy Elements, the company behind Last Period.
Yuu-kun, Merc-chan, and Toto.
.يو وميرك وتوتو
Yuu, Merc und Toto.
Yuu, Merc y Toto.
Yuu, Merc y Toto.
Yû, Merc et Toto.
Yuu, Merc e Toto.
Yuu, Merc, e Toto.
Ю, Мерк и Тото.