Well, if you really want your porngame to adhere to the highest of science fiction standards, than this would be at least my way to go about it:
According to Star Trek the U.S.S. Voyager could make about 1000ly in a year, or about 3ly a day.
Since your vessel's CUM-drive is clearly technologically superior to the Voyager's, I'd wager to say it could make something like 10ly a day at CUM 10. The average distance between stars in the Milky way is 5ly, so your vessel would be able to travel from system to system in a matter of hours. In short:
0 - 9ly = short distance, doable in a day or less
10 - 99ly = medium distance, travel time of a few days
100 - 2.999ly = long distance, takes up to a year to travel this far
3.000 - 39.999ly = remote outposts, and regions still to be explored. It can take you up to 10 years to get this far
40.000+ly = if you went into the right direction, then you would have reached the boundaries of our Milky way by then. Mostly emptiness (Intergalactic medium) for the next 2.500.000ly (or 700 years of travel, at max. CUM-Speed mind you.)