Only One 2 ~Bijin Casino Dealer Hitomi~Sei no Roulette~

Hitomi is a №1 card dealer and bartender at the "Testament" casino. One day she hits a man on her car. Man has no injuries, but loses memory upon awakening. Since he has no identification, he gets name "Kenta" and starts to live under the same roof. Eventually Kenta gets attracted to Hitomi and receives a job at the same casino. Soon he becomes aware of the hidden emotions of his everyday life in Testament.

[From vndbreview]