Yuuji Horii recurs throughout the series as Kenji Meshiya's senior. Despite his substantial personal wealth, he habitually approaches Kenji to borrow money. He works as a prominent developer of erotic games. Visually, his design deliberately resembles the real-life video game creator Yuji Horii. Within the story, he enters a romantic relationship with Miwako Mizukoshi. His interactions consistently involve financially exploiting Kenji while preserving his own affluent status.