Dumon and Mizar were walking home one evening when Dumon heard crying. Dumon sees a box on the street and walks over to the box to find a baby girl inside it. Mizar walks over to Dumon and sees the young girl. "Let's take her home we can't leave h here." Mizar says.
"You're right Miz-chan." Dumon replies picking up the box then continuing to walk home. Once the two made it home they enter their house and set the box on the kitchen table. "I wonder what to name this girl?" Dumon asks. "How about Aria Dumon."
Dumon agrees with Mizar and they make a temporary bed for the infant. Soon after they all fall asleep.