Wholesome, simple story of a silly-billy weirding out her family and friends with their antics driven by the ambitious soul of an ambiguously aged Japanese boy.
I have read ahead, the following is based on the WN.
It peaked during her childhood. Story after this is basically GL/BL crap where nothing really happens and you feel like your time was wasted. It tries to resolve it by moving the MC away from the school life by sending her to yet another school, but the story hasn't been fun since then. Really, should have focused on a college aged adult man turned female doing shit she wants.