Yeah I'm pretty sure that's all the series is about. I haven't read the series for the fact that everything I've heard about the main character makes him a "Grade A" douche. So if you aren't into NTR stay away from this series like it's the plague.
It's not ntr. It's cheating. There is a distinct difference.. The second from what I've read falls under the same category.
________________ ~The best lives are those that are lived while getting a little dirty~ (Gintama) ~If all you think about is money, your heart will become poor~ (Forgot where)
