One day, Kanon Azuma, a first-year high school student who loves helping people, witnesses something falling from the sky. When she went nearby, there was a girl?! "You are my partner!'' Then, she asked her to do something...? There's friendship, effort, and sometimes battle!? A girl's romantic comedy full of sweet, sour, and passionate "kisses" begins! (Source: Houbunsha, translated)