Aizawa Mamoru-san in room 411 is always wearing a rabbit-head… The courier company's good customer is a shy rabbit-man with a withdrawal syndrome. Why is he wearing something like that in the first place? Is he a pervert? Everyday, he receives deliveries, but you can't see his face and he's mute: there's nothing scarier than this. But one day, still wearing the rabbit-head, he grabbed tightly onto my arm, "T-thank you, I'll see you again tomorrow…" Saying it in such an embarrassed way – my heart beats so fast.