In the wake of his parents' untimely demise, Oma Kokichi was entrusted to the care of his cousin. However, as the situation continued to deteriorate and his safety became increasingly precarious, the Saihara family was faced with an unenviable decision. After much contemplation, they resolved to send their young heir to take up residence in the sprawling Oma palace until the situation stabilized. Despite the difficult circumstances, Kokichi remains steadfast in his determination to wreak havoc and insistently bother those around him through his off-puttingly playful and cheerful demeanor.