( Based on the Manga App on Google Play, Get Dumped. 'Cause I'm a huge fan. Get it at the App Store now to see how related they are :) ) 

Amy, a nerd-average student graduating from High School and onto College. But before that, she has to face one difficult obstacle: Three Words. Three. Painful. Words. 

"Sorry, We're Done."

He confessed that he made a promposal (prom proposal) to Amy's twin sister, who looks exactly like her. After Amy requesting one final date, she uses the date as a final chance to erase her twin in their relationship, while dealing with such drama.