I hope the harem ending does Karina justice. She may be a part of the harem but, in a sex game, the amount of sex scenes she got compared to the other girls in the game is laughable. And the scenes themselves were mostly laughable. Her first sex scene made the MC out to be a one pump chump and, when she asked for round two, she doesn't get another round till her epilogue. And her last sex scene was an incomplete blowjob with the promise of actual sex that the audience doesn't get to see.
Sorry for the rant but I like the character a lot, and I feel she was done extremely dirty.