Ima Sugu Onii-chan ni Imouto da tte Iitai! (2012)

Ima Sugu Onii-chan ni Imouto da tte Iitai! is a Japanese visual novel developed by fairys, taking place before the events of Love, Elections, & Chocolate! and revolves around the protagonist Rikuto Mitani, whose father remarried a woman who already has a daughter.