I'm No Angel(1991)

Tenshi Nanka ja Nai

In a brand-new high school of only first-years, Midori, a girl who gives her all, runs for a spot on the student council alongside Akira, a guy who sees things through. Once elected, they start a new legacy at the school while also falling in love.

Midori has had a crush on Akira ever since she saw him stop to rescue an abandoned cat. She hopes to become closer to Akira now that they’re working together on the student council, but his heart may still belong to someone else…

(Source: Viz Media)