Hem I've to admit I've never played LoL. And right now I'm too busy reading To Love RU and taking notes .
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HxH to me is a bit like Soul Eater... I'm having a hard time imagining anything sexy with it.
Don't get me wrong I LOVE HxH (appart from the insect arc but hey now we're done with it) but it would not be easy.
Still yeah... Greed Island Hentai could be a quite cool pitch... maybe you got my attention... we'll see