Cake and Seeiw have been friends for as long as they can remember. Cake is outgoing and has many friends, while Seeiw is shy and barely speaks to people he's not used to being with. Despite their different personalities, they are very close. By being next-door neighbors since they were born, they became an essential aspect of each other's lives. However, as they get older, a lot of things change, and so does the way they see each other.