Oyako to Misshitsu ~Sex Shinai to Derarenai Heya de Hankouki no Musume to Ecchi Suru Live2D Osawari SLG~

The story is about a father and daughter who are trapped in a room they can't leave until the daughter become pregnant, a room created by the government as a measure to combat the declining birthrate, and they try to escape.
The heroine, the father's biological daughter Rin, is unfriendly to her father, but she helps him with naughty activities in order to escape.

[From Dlsite]