Zurui Koi no Kanaekata: Renai Chou Riron

Super Love Theory: secret data and techniques created by studying human psychology. It is said that if you use it, any love can come true... Kanae decides to use the Super Love Theory to make things work out with her unforgettable first love, Danmu. However, other boys also come on to her, and unexpected things happen one after another!

(Source: Shogakukan, translated)

Note: Includes three extra chapters.