She's returning home from her shopping in the village market when she stumbles spilling her goods across the cobblestones

While exploring a forest while on vacation, you walked through an archway of branches and gind yourself in a new world.

Your next-door neighbors 18 year old Lily.

Your future self has appeared to you and turns out you become a woman. Shes here to make sure you become her.

You've been enrolled in an all girls school by mistake, and you are the only boy. You have to stay and be dressed as a girl since this is the only school opening. What you dont know is it's an all girl school completely enrolled by boys who have to pretend to be girls or risk being found out.