With a Stunning Female Ghost at My Back, I Rule the Ghost Domain

[Multiple heroines + vengeful ghosts return + yandere + obsessive love + battle for affection + locked-room confinement] How did the world change so much while I was getting my diploma? Why has my roommate become a ghost and blocked my respawn point? Yang Lin, a college student who hasn't graduated yet, was cornered on his own bed by his roommate. After barely managing to escape, he discovered that the whole campus had become a domain of vengeful ghosts. System notification: To survive, go win over the female ghosts! In that case, I won't hold back. Yanderes, obsessive lovers, and crazies, bring them all on! Throw yourselves at me with everything you've got!