Ever feel like a background character in your own life? Imagine how Lee Jinwoo feels, desperately trying to navigate a perilous dungeon raid while playing second fiddle to destiny itself. In *Regression Guidelines For the Supporting Character*, Jinwoo's got his hands full. Between schmoozing the main quest protagonists, Kwon Taehyeok and Ryu Seonghyeon, and managing the chaotic intervention of the formidable Ronic Guild, he barely has time to breathe. Unfortunately, his neglect doesn't go unnoticed. Cha Sahyeon, a brooding figure with captivating green eyes, finally voices his discontent. A simple request, "Don't go," delivered with unexpected intensity, throws Jinwoo's carefully constructed plans into disarray. Leaning close, Sahyeon's gaze holds a strange, flickering light, hinting at depths unknown. As a mysterious notification echoes through the dungeon, Jinwoo realizes he may have stumbled upon something far more significant than he anticipated. This novel masterfully blends high-stakes adventure with simmering romantic tension. The dungeon raid setting provides a thrilling backdrop, while the evolving relationship between Jinwoo and Cha Sahyeon promises intrigue and emotional depth. Will Jinwoo continue to chase the spotlight of the main quest, or will he finally turn his attention to the compelling supporting character who might just steal the entire show? If you enjoy stories with complex characters, slow-burn romance, and a healthy dose of dungeon crawling, this is one you won't want to miss.