Chocolate Junkie 

A story about an ugly girl named Chiyoko who was always bullied for her looks and when a new good looking transfer student named Aoi comes, he decides to rule over her and announces that he's the only one who can pick on her. From then on, no one but him bullied her but she could also never escape from him until college where she lied and said she was going to the same school but didn't. Now, 8 years later he finally caught up with her...what oh what will he do to her now!? Note: Includes the one-shot "Yo wa Ikanishite Heroine to Narishi ka".