Night Attack on Little Sis!? (also known as Sleeptime Fun!) is a stealth-based simulation game developed by Rayn and Namida. The core gameplay revolves around using "ninjutsu training" to sneak into a younger sister's bedroom to perform various actions without waking her up. Gameplay Mechanics
Development History: The game was originally released in Japan around 2017 and later brought to Western platforms like itch.io in 2018. night attack on little sis sleeptime fun v1 exclusive
Distribution: Often distributed through developer-specific storefronts or subscription-based platforms for early access supporters. Night Attack on Little Sis
Stress Relief: After a long day of school or chores, a five-minute burst of laughter helps kids decompress. The core gameplay revolves around using "ninjutsu training"
: Occasionally, the character will shift positions. Do not touch the controls during this transition, as any input is registered as a "critical noise" that ends the session instantly. Controls Overview Mouse/Touch : Typically used for directional movement and intensity. Spacebar/Action Button