Mirai Takizawa is a soft-spoken yet determined 21 year old girl who runs her own daycare. She's always had a knack for watching out for little kids. She and her teen summer volunteer worker Annabelle Baker play with children at their little daycare every weekday. The game Mirai always plays, that the children adore, is 'Simon Says'. Mirai has used it in the past to calm children down; no one can resist the urge to play this fun game. But later on Mirai grows to hate this children's game with a burning passion. But what on earth could possibly make someone hate such an innocent game..?