Tenshi Nanka ja Nai

Story

OVA — Fall 1994, 1 episodes, Finished.

In a rainy spring day, first year high schooler Midori Saezima saw a tall, handsome fellow student took care of a stray kitten. Without knowing the boy's name, she fell in love with him at the first sight. Due to sickness, Midori returned to school three days after summer vacation -- only to find out that she was "volunteered" as a candidate for student council. After a series of embarrassing accidents, both she and the mysterious boy she had a crush on, Akira Sudo, were elected as members of the student council.

Synopsis via AniList (English).