S県月宮事件 S県月宮
Japanese Internet urban legend in the early 2000s about a yandere self-proclaimed "little sister" going after her crush and attempting to murder his girlfriend. Originated on the Japanese language [[Ragnarok Online]] forums.

h4. External links
* "Reddit explanation":[https://www.reddit.com/r/anime/comments/4fufhj/step_aside_i_cant_kill_her_aka_the_sken_tsukimiya/]
s prefecture tsukimiya incident (urban legend)