Description

In Oku-sama wa Onee-chan you play as Toshiya, an overly shota-ish high school student, and you find out one day that the onee-san next door (Yukari) that you've had a crush on for a long time is getting married. Later you find out that it's you she is getting married to as part of an arranged marriage between your two families. For most of the game you and Yukari get to know each other better through sex with some side romances with other girls along the way.

Taken from a review by Schmuck @ Hongfire