Night Attack On Little Sis Sleeptime Fun V1 New Site

In a world where nighttime is filled with magic and adventure, a group of friendly characters embark on a mission to bring excitement to Little Sis's sleeptime. With a dash of humor and a pinch of whimsy, they plan a "night attack" filled with playful surprises.

: It features a 2D anime art style typical of the "H-game" or adult simulation genre. Release History Initial Japanese Release : February 10, 2017. Western Release : September 24, 2018 (North America and Europe). Availability : It has historically been hosted on platforms like under its alternate title, Sleeptime Fun! technical troubleshooting night attack on little sis sleeptime fun v1 new