Tengen Hero Wars is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here. You are reading Tengen Hero Wars chapters on VipToon.Net, fastest updating comic site. The Summary is
One day, the hero-adoring highschooler Oda Nobunaga, together with his sister stepped into a mysterious other world. There, were all the strongest and famous historical heroes and figures of the Warring Kingdom period. The curtain rises on the battle to decide who the strongest hero is, and who will be the ultimate ruler.