Yes he did, he mentioned before in the first Kuroneko manga. He slept around until he met Keiichi. In fact, you can go read the latest Kuroneko series if I'm not mistaken, this couple here appeared there too. mangalover23
I remember that he used to sleep around with many men but rape them??? Rape isn't sex
Wait was that black cat Shingo? He used to be a fucking cat rapist what the hell