Midori Saezima, a first-year high schooler, witnessed a handsome classmate taking care of a stray kitten on a rainy spring day. Despite not knowing his name, she instantly fell for him. However, her illness caused her to miss the start of summer break, and she learned that she had been nominated as a student council candidate. Despite facing multiple embarrassing situations, both Midori and her crush Akira Sudo were elected as members of the newly established high school's first-ever student council. They are now committed to creating new traditions for their school while navigating their bittersweet love story.