□□ and Someone Else's

I'm a famous sword. My current wielder is a young hero renowned throughout the martial world. He's young, handsome, comes from a good family, and has superb martial arts skills. His master is a worldly expert with no fixed abode, cold on the outside and a hopeless romantic on the inside. He's got the desire but not the nerve, and he sneaks out in the middle of the night year after year to steal the sword and indulge himself. One night, amid thunder and lightning, his master relapses and commits the deed again. Then I took human form. This is awkward. Sword demon beauty top x seemingly cold, actually hopelessly lovesick, blushing martial arts powerhouse bottom Theme: