Based on the adult game by Moonstone Cherry. 
 
Keiichi lives under the same roof as his five younger sisters and he had a problem… he couldn’t help but be turned on by his sisters developing bodies. 
 
One summer vacation, their parents decided to go on an overseas trip, leaving Keiichi home alone with his sisters.
Ririna, his serious younger sister, took a strict attitude toward Keiichi, thinking that her sloppy and perverted brother would become more and more vulgar while her parents were away. 
However, Ririna secretly masturbates, even while saying that she hates naughty things. 
And Keiichi just so happened to know that... 
 
(Source: Getchu, translated)

It's summer vacation and Keiichi's parents left him with his five younger sisters to go on an overseas trip. Now with their parents far out of the picture, his younger sisters are aggressively making their moves on him. Of course there's no way he can hold back.
(Source: Hau~ Omochikaeri!)

Based on the erotic game by Moonstone Cherry. 
 
It’s summer vacation and your parents are heading overseas for work, leaving you with your 5 little sisters: typical lovestruck imouto Aya, modern tsundere Rio, timid and shy Hiyori, lively and perverted Koharu, and the bookworm Michika who's a lovable Sadist. With no distractions and ecchi happenings one after the other, how far will you go with them? 
 
(Source: Hau~ Omochikaeri!)

Based on the erotic game by Moonstone Cherry. 
 
With their parents departing on a business trip, Yuuichi was left alone with his five imoutos for the entire summer vacation. He wanted to take advantage of this opportunity to be closer to his imoutos, and they were also strangely assertive, leading to ecchi incidents one after another. Just how far will the Nanase siblings go? 
 
(Source: Hau~ Omochikaeri!)

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