Dark James 'Bucky' Barnes x MMA OC AU Vivian Tate is a professional MMA fighter and UFC champion, but when she gets knocked out during an intense fight with The Widow, she loses her champion title due to her arrogance and hot-headed temperament. Her coach and mentors quit and gave up on her due to the loss and now irrelevant status in the UFC. Vivian's manager and best friend, Sam Wilson, was the only one to stay loyal. When she threatened to quit for good, he suggested she go to one of the greats, The Winter Soldier. His extensive training in mixed martial arts and UFC champion background was impressive, although Vivian declined without hesitation. She couldn't train under him... Not if she wanted to ultimately beat her rival This story is 18+ (I will list tags in the first chapter, updating as I go)