I even talked to them that at some point between golden bunny and the previous events the drop rates have been reduced, and I'm sure about it.
Kobans spent on fights:
Golden bunny: 1000 kobans, got the girl in the end
Sexy beast: 700 kobans to get both event troll girls
The revival of Lupa and other legendary girls incoming: 600 kobans, gave up with no girls

Their answer: Hey, it's random, we can't do anything about it. It was bad luck.

Probabilities have a limit you know? Only if the drop chance is ridiculously low it can be that difficult to get a girl. In the end the probability of NOT getting a girl for so many fights should become impossible. And this is not the case. It's like throwing a dice for 100 times and not getting a single 6.

Kinkoid does not really care anymore for the free-to-play players guys. Assume it. They don't even read this forum anymore