Azuki-chan(1995)

Azuki-chan is an anime series following Azusa Noyama, a fifth-grader who goes by the nickname Azuki—a name she's never liked. When new student Yuunosuke Ogasawara arrives and tells her he actually likes her nickname, Azusa finds herself drawn to him. The two begin dating and start sharing a diary together, navigating the early stages of a school romance. The series captures the sweetness and awkwardness of young love, following their relationship as it develops against the backdrop of everyday school life.