I Became the Useless Disciple of the Demon Sect

Yeo Hee-soo, a perennial aspiring actor, finds himself acting in another world, not in front of a camera. Where? In the middle of a demonic cult! And on top of that, a near-death experience awaits him as soon as he's summoned! He desperately tries to escape, but things take a turn for the worse. Am I the Third Prince, the candidate for the Demonic Cult's leader? It wasn't intentional, but he must act like the Third Prince to survive. However, the gaze of the leader, who allegedly destroyed the Third Prince's dantian, is strange. No matter how much he tries to avoid it, it keeps coming back, and with a strange obsession, he keeps acting violently(?)... "Bark. Only in front of me." That gr...