Doufu Mayoi 
Black Summoner (Manga) Volume 15 [EPUB ebook] 

“Why don’t you all come at me at once, with all your power!!!”

The Beast King Festival continues, and several schemes are afoot! Kelvin and Leonhart are duking it out, Ange is shadowing our favorite battle junkie, and Sera is on the hunt for a mysterious yet strangely familiar contestant who shares her last name. Many threads slowly weave into one final confrontation, but how will it all shake out? Kelvin is certainly powerful, yet Leonhart has got to have tricks up his sleeve as well, and may prove to be the toughest opponent he’s ever faced. But why did he put on such a sham of a fight, and how will this grudge match end?