I don't know the name but it about some green haired girl who is the next heir to a karate dojo. She doesn't want to be in charge and basically dismisses it. From what i recall, a guy, practically a mountain, protects her, claiming to be in love with her. Also, despite not wanting to fight, she fights fairly well. She's technically weaker than the big guy protecting her but he lets her beat him up when he gets perverted. That's all I remember.

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im not angel, but im more pure that you.