Saya is the youngest girl in the family of Onikiss, in the game she is the most seductive and hyperactive apparently and it get's worse when you pick her in the VN as a route. She has a brown hair, she has flat-chest and she loves her most precious thing on the world the most, obviously it's you: Onii-chan, also she loves some kind of penguin popsticles as her favourite candy too.
Onii Kiss: Onii-chan, Where’s My Kiss?
The Seguchi family has a very peculiar house rule. Possibly influenced by their mother, the kiss demon, all four of the imoutos yearn for kisses from their onii-chan for practically everything. Of course, there would be kisses for leaving and sleeping, but it would be wanted even for phone calls and going to the washroom. However, one day, he moved out of the house to concentrate on his studies. His imoutos would bring him midnight snacks every day, but there was an argument over who would be the one to do it. So, they decided to add a new house rule: the one who kisses onii-chan the most during the day will be responsible for bringing him the midnight snack!
