Strongest Fighter is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Woken up from a date, he’s suddenly in a movie set? Wait, he’s been reborn as a baby martial artist!
In Jongnam Clan, which was once one of the 9 strongest clans, he receives the name “Gunchung” and uses the knowledge of his past life to learn the true meaning of martial arts.
When your perspective is different, your martial arts changes. Armed with knowledge, Gunchung brings about a new age of martial arts!