Rio was looking forward to spending her summer vacation in Tokyo, meeting boys and going out with friends. But after a change of plans forces her to stay the (whole!!) summer with her grandmother in the countryside, she's devastated... until she meets Ginzo, a handsome, mysterious guy with incredible talent and a hidden past... (Source: Kodansha USA)

Ao Natsu was published digitally in English as That Blue Summer by Kodansha USA from January 7, 2020 to August 18, 2020.