"Wouldn't a blowjob be better than studying?"
Even if her grades are bad... Karin's mouth pussy can solve it all! She gathers all the teachers from her weak subjects and gives them a series of blowjobs to easily get her credits!
Even her teachers think Karin is cute. She's a standout student, but her studies are terrible. Her attendance is sparse, and she's in danger of graduating. Worried about Karin, her homeroom teacher kindly offers to give her advice. However, upon investigation, she discovers that she's getting credits in all subjects except for her own. Curious, she calls Karin in to ask what's going on... and Karin does something unexpected.