Okunaga Mio

Likes: Her work, her friends, her brother (that's a secret)
Dislikes: Lies

Shun's older sister who works at an eroge company. She is currently looking after her brother because their parents are abroad on a business trip, although most of the time she only supports him financially and lets Ayane handle the rest. Actually good at all sorts of household chores, however Mio doesn't have many chances to show her skills off due to working a lot. She often uses the things that happen in Shun's life as a reference for her games.