Your Father is a Kengan Fighter

After giving birth to her twin daughters, Amanda and Diana, at eighteen, Kyoko Ran, marries their father, Ohma Tokita, she hopes their future will be fine. She loves him and vice versa. She knows he loves fighting, and she doesn't mind, so long as he comes home in one piece and stays alive. But fighting soon becomes his main goal in life and soon believes it's his family getting in the way of fighting goals and pushes them away until Kyoko has enough and leaves with their two daughters.

Eight years later, the oldest, Amanda, is a spitting image of his personality-wise, but when she finally gets to meet the man she and her sister Diana have always wanted to meet she is willing to go down the same path to become a Kengan fighter, much to her sister and mother's dismay.