Shigofumi primarily centers around a young-looking girl named Fumika who works as a mail carrier to deliver "after death letters". These letters are written by people after they die and are delivered to the person the letter is addressed to in the living world. The letters contain things that the now-deceased could not say while they were alive, such as things they wanted to say before they died, or even to inform others about who killed them in the case of a murder. Accompanying Fumika is her talking staff Kanaka which can also float of its own accord and likes to be treated as if "she" were a human. In contrast to Fumika who is quiet and serious about her job, Kanaka is loud and boisterous. The story follows Fumika and Kanaka as they interact with the living via the shigofumi. Shigofumi mail carriers are assigned a specific area that they deliver letters to, just like a normal mail carrier. When they are not delivering letters from the dead, they are in another realm called Shigo. The mail carriers are usually now-dead humans who do not age, and take on the appearance of just before they died, but Fumika does age, signifying that she is not dead yet.
一个人死前没能说出来的......留下遗憾的......就这样逝去。一位邮差、送上人类最后的奇迹。
“死后文”、死者身亡后给生者的一封信。这是死者的故事。这是生者的故事。这是奇迹的故事。人在现实世界的生活中,必须面对许多不合理的事情。不同的童年时代。朋友关系、家庭、还有面对未来的不安--另外做为答案的一种,还有“死”。有选择这个结果的人,也有给予这个结果的人。
如果能够知道已经离开了人世的人们想要传达的消息的话......于是,给仍然生存着的人们传递着由往生的人们寄来的“死后文”
过世的人的思念是?传递到现世中的信息是?
围绕着死亡而发生的一个个小故事组成的,传达着自身的存在理由以及生存的意义的故事。