Synopsis

"Do you still feel like playing as detective?"

From his kouhai at Naoetsu Highschool, Higasa Seiu, comes rumours of the kidnapping of an elementary school girl.

Araragi Koyomi, now a first year university student, along with Hachikuji Mayoi, Oshino Shinobu and Ononoki Yotsugi begin investigating, but...!

This modern day oddity! Oddity! Oddity!

In the Evening(Yoi) darkness, youth shines brightly.