Fantasy Ni Ha Najimenai around Fourty Otoko, Hard Mode Isekai Ni Teni Shitakedo Kekkyoku Muso 1 (FW Comics)

[Machine Translation] If you don't kill, you will be killed! The otherworldly hard-mode survival is about to begin! Shuichi Magara, the second-generation president of a small printing company who succeeded his parents, has been kept alive by the board of directors. The only thing he enjoys is reading otherworldly novels in the middle of the night. His wish is fulfilled when he is transferred to another world, but he is immediately arrested as a suspicious person and enslaved without question. He is placed at the bottom of the pecking order with Kee, a boy he met during his pioneering life, and old Dan, but the slaves end up killing each other over food! Hard mode survival in another world!

殺らなきゃ殺られる！　異世界ハードモードサバイバルはじまるよ！小さな印刷会社で親の跡を継いだ2代目社長、間柄修一（まがら・しゅういち）は役員会の妨害により飼い殺されていた。楽しみは夜中に読む異世界ものの小説のみ。そんな彼の念願かなって異世界に転移したが、不審者扱いですぐさま逮捕され問答無用で奴隷にされてしまう。開拓生活中に知り合った少年キー君と老齢のダン爺とともに序列最底辺にされるが、食料をめぐって奴隷同士殺し合うことに！？ハードモード異世界サバイバル！