The Starting Point of Mixed Martial Arts Is the Inner Demon

An otaku who loves games, animations and novels got reincarnated and came to a world of mixed martial arts where several dynasties coexisted. He became a little baby and was adopted as an adopted son by an old man who had just pretended to be dead to escape. He inherited the old man's skills and encountered a fantasy system condensed from his past life memories. So it's time to take off! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.