I Was Possessed into an Oriental-Style BL Dating Sim Game

[system] Welcome to <The Night the Lycoris Weeps>! Yu-won wakes up to find himself possessed as Ga-yu, the main protagonist of the ultimate angst-ridden novel, <The Night the Lycoris Weeps>. It's miserable enough that he woke up after the tutorial had already passed, but to make matters worse, he has entered the route of Crown Prince Jeok-un—a route that had always ended in failure during previous playthroughs. Not only is this a route where the probability of survival converges toward 0%, but the story keeps warping, leading to a continuous series of situations where one wrong move means death. To make matters even worse, a strange game system window appears before his eyes... [system]...