6inch My Darling is a visual novel romance adventure originally released by KID for Sega Saturn with free for all rating, thus not including adult content. Half a year later, the game was released on PC platform by Airyu with added adult content and altered setting and story elements.

The story follows a high-school student, named by the player, who lives with his parents and a younger sister. During his time off of school he is helping his mom by part-time working at the liquor store. One day, upon returning from school, he stumbled on a buried box while taking a path through the woods. Inside was a strangely shaped figuring with a message on the inside of the box lid. Not sure what it all was about, he left it on the desk and went to sleep. The next day, he heard a voice in his room, and while trying to determine the source of the voice he stumbled upon a small girl by the name of Etosera. And by small, it means 6 inches in size. But she wasn't the only one that appeared due to the mysterious box, two more girls, Minty and Pim, just as well, also became his secret roommates. Thus his next couple of weeks filled with surprises and getting to know each other commence, all the way while they are trying to build trust and assess the relationship with humans, namely, the player.