Aoi is an 8-year-old boy who is too shy to voice his opinions. One day, he stepped on the bud of the flower in the plant bed when he was playing soccer with his friends. He had feelings of guilt, but he left. Through this event, he happened to meet a mysterious girl and a strange old man called “Mr. Flower”. Aoi takes care of flowers with them every day, and he faces his true self through this encounter.