Mako

She is the heroine of the "Don't Do It! Mako Sexy Symphony" arc of the series (eps. 7 & 12) who is a young girl who dislikes miniskirts or anything skimpy that garners attentions from perverse males, especially her friend Yuu who has a crush on her. Mako is forced to wear a short skirt that exposes her panties as her other skirts are in the laundry, she gets irritated when a perverse hand gropes her behind on the crowded train on the way to school. Her thoughts on sex are negative and doesn't like it when her younger brother whose just a grade school kid watches stuff on TV that has sexual acts in them. However, an encounter with a mysterious girl opens her mind to the pleasure that any sex act brings and her first taste comes with a passionate masturbation sequence with this mysterious girl acting as a puppet master controlling Mako's every movement. The experience thrills Mako so much that she enjoys sex and even has become more flirtatious with Yuu, but she is starting to lose control of these new sexual feelings that are being drawn out further by a mysterious and seductive woman and is becoming a sex machine. The only person who can save Mako from herself is Yuu.