Mizoguchi Keiji's art is so... damn. Hhhnnngggghghh-inducing to say the least.
Also in some illustrations I thought Sorata looked like Keiji's render of Akihisa Yoshii in his BakaTest doujin. Which, coincidentally, was about Yuuko (Hideyoshi's twin) coming over to Akihisa's house to tutor him... which ended up into a gaming session instead. Considering it's Mizoguchi Keiji, of course it is SFW.
... Whoops, going off on a tangent there.
... Now if someone would be kind enough for summaries...