Four (or maybe it was five or six) young adult friends find a strange portal in the meadow almost entirely surrounded by the Everstanding Forest beyond their village, where they have their hidden getaway place. They don't understand what it is, and come to examine it carefully. It is thin and disklike in appearance, with a rounded edge, light without distinct view of anything is showing from one side, a darkness shows from the other side. It hovers about a royal standard foot above the ground, where there is still thick growth of meadow grass. It clearly is not going anywhere, as they carefully watch it all that day. They come again in the afternoon of the next day, and find it remaining there. Curiosity overruns, and they find a few broken branches, to poke at this portal they do not understand, gently at first on the shining side. The end of each branch passes through unobstructed. One among them goes to look at the other side. Regardless of how deep one holding a branch inserts it, the one watching behind it tells the others there is nothing seen of it on the other side. The others then check that, and they all confirm the same thing to one another. Each time a branch was inserted, they were able to pull it back still with its same formation, fully.

It dawns on them then it is probably a portal to somewhere else. Each dares any of the others to put their head through that portal to look where it leads beyond it. One of them finally dares to do that, to look around at what is on the other side.

What this story will lead to is a place full of fantasy, clearly of another world. Who will want to come and roleplay here?