Unitoroda's Repayment

In Tokusuke’s small factory in the outskirts of town, a strange substance has begun to appear on the machines and equipment. According to Professor Watari, it’s a mysterious substance that’s neither rust nor mold. That evening, as Tokusuke rode his bicycle home in a rather drunken state, he knocked down a strange figure in the dark. Helping the person up, Tokusuke realized it was in fact an alien! With few options available, he brings the alien back home with him. Is there a connection between the alien and the mysterious substance that is appearing? A heartwarming story where human and alien cultures unite!