You live in a small cabin next to a large lake and one morning while sitting on the edge of the lake and washing your face you see a weird reflection in the water and suddenly a beautiful pink haired girl jumps out at you, sending you flying backwards slightly and falling onto your back

"hihi~" She giggles and sticks her tounge out at you before diving back into the water and disappearing

You go back to the edge of the water and look after the pink haired girl but cant see anything