The chapter opens with Ko reflecting on his complex relationship with his childhood friend, Mahiru. Despite the friction between them—exacerbated by the influence of the mysterious vampire Kiku Hoshimi—Ko decides he wants to reconcile. However, he realizes that to face Mahiru safely, he must first master his "half-vampire" state to prevent himself from going on a berserk rampage during moments of high emotion. The Trigger for Transformation

While Ko and Nazuna are busy training, the story shifts to Ko's other friend, Akira Asai. In a classic comedic subplot, Akira is dragged along by Midori and ends up being forced into a at a maid café.

Call of the Night Chapter 107: The Half-Vampire Training Arc Begins