Mangas

サマーウォーズ キング・カズマvsクイーン・オズ, Summer Wars Gaiden, Summer Wars Gaiden: King Kazuma vs Queen Ozu, Summer Wars: King Kazuma vs. Queen Ozu
A spin-off story focuses Kazuma Ikezawa (King Kazuma), Natsuki Shinohara's cousin, as he battles his way in the Oz Martial Art Competition.