This is good so far and it can become even better. Not a bad story, hot girls, enemies to kill, some nice sex scenes.
What I don't like? The renders are too bright for a vampire game. The action is set at night but it looks like daytime outside.
Take a look at Rebirth and The Bite Revenant for inspiration if needed to make a darker atmosphere.
Then we have some small details like when the MC is drugged in the Hotel suit. There is a giant window open and it seems like it's dawn. The MC is kidnapped and his vampire sister remains there unconscious on the bed to embrace the sun and final death.
A nitpick, Hell City is a bit edgy I think but this can be changed easily turning it into a nickname for residents or people who know about vamps. For example the city can be Chicago or whatever but they call it Hell.