You can chose from 5 eroge here: https://goo.gl/forms/dlIwA0ss2IsOTbEm2
The list:
Mama no Oppai ~Ore no Doutei Milk ga Shiboritorareta Ken~ https://vndb.org/v19905
Maro no Kanja wa Gatenkei https://vndb.org/v12034
Onee-chan no Yuuwaku https://vndb.org/v22483
Otto no Inu Ma ni... ~Watashi...