Riho discovered that her favorite student already had a girlfriend. Feeling extremely jealous, Riho is determined to win back her favorite student by... sucking his dick! "Sucking dick doesn't count as betraying your girlfriend, right?" With that thought in mind, Riho always uses both her mouth and "lower mouth" to suck her student's dick. Even if they are in class, during a test, with the student's girlfriend nearby, Riho uses both of her "mouths" to suck out all of the student's sperm, making him belong only to her...