Innyuu Famiresu ~Shin'ya no Bonyuu Service wa Ikaga?

Family restaurant "Flowers" values service quality above all. Only cute big breasted girls in mini-skirts can become waitresses there. But one store of the chain hits all records with its sales, and the secret lies in midnight menu. A vast list of sexual services are presented in the menu for a substantially higher price.

[From vndbreview]