The incident happened a few hours before. We will rewind to the time when Ninomiya Jungo's life was as of yet, peaceful.
The incident happened along with the sounding of that doorbell.
The first Sunday of the rainy season. Early afternoon, a few cicada calls still remaining.
From down the stairs, through the long hall, from the entrance, he has picked up a far-off sound in his ears, and has switched off the vacuum cleaner, and raised his head.
Ding ... dong. Once again from down the hall, that insistent sound.
"Okay, okay, I'm coming."
He heads down the hall, responding in a loud voice, breaking into a slight run down the sun-filled hallway, and flies down the second-floor stairs.
Past the old-fashioned black telephone, through the chandelier-hung hall...
"May I ask who this is?"
While he asks this, the front door is pushed open.
At the same time as the light streaming in, the face of a young man, filled to the brim with smiling, comes into view ―
That's right, it all started from that cheerful fast talk.