After Tanami Riku's father passed away in a tragic car accident, he found himself completely alone. However, Onikubo Nagi appeared out of nowhere, claiming to be his guardian in lieu of Riku's deceased father - who just so happened to be Nagi's previous mentor. To make matters even more complicated, Nagi even became Riku's homeroom teacher without any consent. Enduring the daily challenges of living with such a sadistic individual was no easy feat for Riku. But what were Nagi's actual intentions with Riku?
