The older brother of the Onami family lives with four sisters, Sora, Akane, Kohaku, and Sumi. Having been suffering from severe asthma when I was little, my daily routine is to "sleep with one of my sisters". One day, my parents, who were also researchers, ordered me to carry out a demonstration experiment of "improvement […]

2013

The proud princess Olivia Lindegald is forced to become a sex slave to save her nation and is degraded at every turn. Based on the game by Silky's.