(Teppuu, Ohta Moare, 2008-2015, 8 volumes)
As far as martial arts manga goes, the martial arts aspect isn't above average, though it does provide some interesting glimpse to the woman part of MMA.
But what makes this manga interesting is the main character. Usually the main character for martial arts stories is the untalented underdog who wins through sheer effort. The rival, a haughty powerhouse with immense talent but undone by his/her arrogance.
This manga uses that rival character as a protagonist. Natsuo Ishidou is an arrogant bully with an immense talent for any physical activity. Her reason for entering the mixed martial arts world is basically to crush a gung-ho MMA enthusiast because for some reason she piss her off. What makes this manga successful is that it really strikes the right balance to make such a character likable enough.
It also strikes the right balance of realism. Though Natsuo has a great sense of movement, sense can only goes so far if you haven't mastered the techniques, so she actually lose more than she wins, and the wins are often because it hasn't turned into a battle of techniques.
