The heroine of this story is invited to a different world called ‘Yume Sekai’ (Dream World). She has to go on a journey, where she frees princes who are sealed away in rings, so they can stop the evil Yumekui, who eat the dreams of people.
The series is based on a smartphone puzzle game aimed at women that lets them fall in love with a prince. The game is often called just Yume100. The game is celebrating its third anniversary this year and unifies puzzle games, RPGs, and love simulation games in a single game. Users can choose between over 170 different princes from unique nations, who are all drawn beautifully and are voiced by amazing voice actors.