Gokujou Bitter Shounen summary:

Tsubasa, boyfriend less, 18 and just failed her college entrance exams gets a job tutoring the son of her mother's superior. He's handsome, smart and perfect boyfriend material but he just so happens to be younger than her. So, she plans to make him into the perfect man! She then makes a list of qualities he should have but what happens when the one person who isn't supposed to see it sees it? Tricks her into something? And then uses it to blackmail her? Read and find out!