One day Lag Seeing finds himself shipped. His mother abducted by someone, he's now just a package sent by her to be delivered to a friend's house. Gauche Suede is a Letter Bee, a member of the Amberground national postal service, who is tasked with delivering this "letter," together with his partner Roda. The still young Lag rebels at Gauche's seemingly emotionless focus on his work, his heart still reeling from being torn from his mother, but as they head into a valley they are attacked by a ferocious creature known as a Gaichuu.
何者かに母をさらわれ、ラグ・シーイング自身は「テガミ」として送り届けられることになった。そのラグを送ることになったのが、「テガミバチ」のゴーシュ・スエードだった。だが大好きな母と引き離され心を閉ざしたラグは、自分自身の感情を押し隠し、仕事をまっとうすることを最優先とするゴーシュに反発するが…。
La historia comienza con 18 años de edad, Suede Gauche, una carta de abeja, llegando a recoger a su último paquete. Sin embargo, se sorprendió de encontrar su carta a ser un niño llamado quedarse viendo.