The Book Of Letters (bestlightnovel-com)

Postman Kurai Ak.u.mu and postwoman Aoko Ito are two lovers who just began their long-distance relations.h.i.+p. They promised to send each other letters every single day, regardless of the content. If one of them miss a day, the other would know something bad has happened to them.This is the story of the couple and t…