ユーリィ

Magical girl.
She saves Ayumu from being mugged by a delinquent, but when her magic fails and is laughed at, she gets angry and casts a spell on Ayumu to make him ejaculate uncontrollably as a punishment.
She is little anxious about her short stature, but despite her appearance, she is a bit of a sadist, and don't hesistate to tease Ayumu in a very sexual way.