Muscle Girl (2011)

Orphan of a wrestling legend....
Dojo threathen to buy by a rich rival dojo / gym...

not dorama but anime - Sekai de Ichiban Tsuyoku Naritai!
very similar in many ways.....
While Tofu Wrestling is idol highschool girls wrestles part time....
In Sekai de Ichiban Tsuyoku Naritai!, idol goes into wrestling after witnessing her friend being beat by a pro wrestler....

lead cast in Sekai de Ichiban Tsuyoku Naritai! - SAKURA
lead cast in Tofu Wrestling - SAKURA
both wears red & white wrestling gears
both faught to reach the top (finals)
both are short black hair (In the anime Sekai de Ichiban Tsuyoku Naritai! Sakura cutted her hair in the middle of the series)

On a spring day Munakata Ikujou visited an old temple to view a 1000 years old sakura tree. There Ikujou discovered a 3-year-old girl and adopted her as his own daughter. 16 years later, Sakurako has grown up to become a beautiful woman. Sakurako then has a fateful meeting with Takanashi Hiroto. Their pure love begin.

Ichikawa plays the part of Azusa, the only child of the owner of a small female pro-wrestling organization. After her father dies of illness, she has to take over the business, which is already losing money and is on the verge of shutting down. To make things worse, their referee suddenly disappears on the day of one of their shows, leaving behind only a resignation letter. The desperate Azusa then runs into a young Korean man. She persuades him to serve as a referee just for that day, though she doesn't realize he is actually a popular star in Korea.