Atsushi and Miyu are childhood friends who are known as the perfect couple by friends and family. They’ve been together since they were small, live next to each other, and are often teased by others for acting like newlyweds. However, there’s one big problem. They’ve never properly confessed to each other. Even though they are so lovey-dovey, it is too embarrassing for them to say those few words, believing that they do not have to say it because they know it deep down. However, Miyu wants to one day have the courage to say the words “I love you”.