Kaeru ni Natta Ouji-sama

High school student Haru Mitsuhashi is confessed to by the boy she admires, Shiki Touma. She happily accepted, as she had harbored feelings for him ever since he helped her out on the day of their entrance ceremony. The two begin dating and immediately decided to walk home together. However, even though she should love him, for some reason Haru finds Shiki disgusting. And at that moment, Shiki appears as an ugly frog to her...

(Source: Kodansha, translated)

Note: Includes three extra chapters.