Naisho no Kokonattsu

Coco and Nuts are a girl and a boy who find themselves caught in an extraordinary situation: whenever either of them sneezes, they switch bodies! As they struggle to deal with their unusual predicament, everyday life turns into a series of hilarious mishaps, romantic misunderstandings, and unexpected complications. A lighthearted body-swap romantic comedy by Kazuko Tomidokoro, originally published in the early 1990s.