Azuki-chan is a manga series centered on Azusa Noyama, a young schoolgirl who earned the nickname Azuki-chan after being mistakenly called Azuki in her youth. She despised the name until a new student, Yuunosuke Ogasawara, joined her class. On that same day, a boy named Ken-chan teased her about the nickname. Yuunosuke-kun passed by, happily memorized the name, and became the first girl he noticed. Overjoyed, Azuki instantly fell in love with him, coming to love both him and her nickname. However, Azuki grows jealous when she sees him chatting with other girls and cannot figure out why he does not realize her love.