Mai says she used to be a very serious student. But lately, she's become obsessed with masturbation and has grown to love sex. With an innocent smile, she honestly undresses, revealing her well-shaped breasts. She expresses pleasure during persistent cunnilingus, happily licking the penis and eagerly mounting it herself in cowgirl position. Moving her hips vigorously, she finishes the session as a cheerful, energetic girl, smiling all the way through.