"Cha-Cha" is a story that depicts the love and growth of Chacha, a girl whose motto is "to live as you like, without worrying about what others think." Chacha's liberal behavior occasionally makes people around her feel itchy, but she sees herself as a stray cat who pursued employment and love on her terms. Chacha met Raku on the rooftop one day and was drawn to him, even though Raku and her hobbies are diametrically opposed.