Catch These Hands, Vol. 1 by Murata

Back in the day, Takebe was a tough-as-nails delinquent who could throw hands with anyone. But right when she finally decides to leave her old ways behind, Takebe has a surprise reunion with her old rival, the “Bloody Cardigan” Soramori. After all these years, she still wants a piece of Takebe—but not in the way anyone expected! Her proposal: If Soramori can beat Takebe in a fight, they have to start dating?!