Love & Revenge

When a boy called her out and confessed his love to her, it turned out to be a prank... Sayo was upset that she had been tricked, and vowed to become cute and get back at him. When she entered high school, Gai Suzumiya started talking to her, and for some reason he knew about her past. As they spent time together she started to become interested in him...!

(Source: Ciao Plus, translated)