Trapped in a Game That Flopped

I'm going to live a normal life, said Shari Azriel, the apothecary of the Dover village. Then one day, I realised that I possessed an NPC in a video game! I've been locked up here for two years, and I only just noticed. However, it was too late when I came to the realisation that... I can't log out because of an error! That means, the only way out would be approaching the male lead, "The Lord of Nightmares", and helping his comrades defeat the final villain. So I have no choice but to wait until the game ends... The difficulty level, the story, the likelihood of failure in such a heinous game, a game that nobody won before... "The Lord of Nightmares has a strong urge to kill you." Somehow, I believe that dying by the male lead's hands would be faster. Source: MU Includes 6 extra chapters.