Seiko is the cool-headed type of high school girl with black hair and straight-cut bangs. At first glance she looks dignified, but the truth is she's a perverted girl who's crazy about masturbation. She will make a boy cum from a titjob while her whole body is feeling flushed after he teases the inverted nipples at the tips of her huge tits. (Source: FANZA, translated) Note: Published in Angel Club MEGA Vol.16.