Hikari in the Country of Hearts

Hikari in the Country of Hearts (ハートの国のヒカリHāto no kuni no Hikari) is a Pretty Soldier Sailor Stellar crossover written by vanderlindemorgan.

Plot
Hikari keeps seeing another world whenever she looks in mirrors. One day, she gets too close to one and is pulled in by an unknown entity. She is pulled into Wonderland, where the entity, revealed to be Joker, tricks her into taking a vial of mystic medicine. This medicine binds her to Wonderland and forces her participation in a mysterious game. In order to return home, she has to fill up the vial with liquid, which she earns by interacting with the roleholders in Wonderland.

She slowly navigates the strange land and meets an array of characters, particularly taking a liking to Peter White, the Prime Minister of Heart Castle.

Trivia

 * This crossover is not canon.