Wheel of Time

The Wheel of Time is/was/will be an object, of which the purpose is to keep the timelines of the Cosmos separate where they need to be. The Wheel is not perfect, however, and sometimes the timelines to get a bit muddled up. The Wheel also works on a more cosmic scale, which means that for people who come near it their own timelines might become a bit distorted.

Aarin and Reni found the Wheel of Time during an episode of Momoclo-Chan, and as a result of their proximity to the Wheel they both re-experienced memories from many years ago, very vividly. Neither of them seemed to realise that this was the Wheel's doing, and regarded the whole thing as a bit of extreme nostalgia.