Kuromine Asahi is an individual who lacks the ability to deceive others. His emotions are easily detectable by those around him, earning him the nickname "ana no aita zaru" or "anazaru." Due to his honesty, people often turn to him for advice and would sometimes exclude him from their private conversations. On one occasion, while expressing his feelings towards Shiragami Youko, Asahi discovered that she was actually a vampire. To prevent her from leaving school due to the revelation of her secret, he vowed to protect this information at all costs.