Tick! Tack!

Four friends—Rin, Nerine, Mayumi, and Itsuki—decide to have a sleepover at Nerine's house. But when Mayumi accidentally activates a magical artifact, they find themselves teleported into the middle of a forest. After wandering, they discover a house belonging to Nerine's parents, and to their shock, they encounter a younger Sage (Nerine's mother) and Ai, Forbesii's fiancée. They soon realize they've been sent 20 years into the past, to the Demon World. Thanks to the younger Forbesii, who still lives in the Demon Palace, they're allowed to stay until they recover the artifact needed to return to their timeline. However, their unexpected arrival disrupts history: the day Sage was supposed to confess her feelings to Forbesii has been moved. Can they return to the present without altering the past?