Yami Baito Saki wa Isekai Deshita

Without money, survival is impossible. When his parent falls gravely ill, high school student Hashiba Ryuuji is forced to abandon his personal dreams and enter the workforce to cover mounting hospital bills. Desperate for a way out of his financial burden, he stumbles upon a part-time job offering an impossibly high salary. Despite recognizing the glaring red flags, Ryuuji accepts the position, hoping that this influx of cash will finally allow him to pursue his aspirations once more. Following his new employer's cryptic instructions, Ryuuji steps through a mysterious door, only to be transported into a completely unknown world. Far from the simple paycheck he anticipated, he immediately finds himself under attack by hostile monsters. What began as a questionable side job has abruptly thrust him into a dangerous otherworldly reality, leaving him to fight for his life in a place where the true cost of his employment becomes terrifyingly clear.