無能無双～出来損ないの人造人間《ホムンクルス》に転生した俺、努力しすぎて最強に至る～ (Associated Names)

The protagonist, who had lived an ordinary and dull life, one day gets into an accident and dies. Naturally, he assumes this is the typical isekai reincarnation— Or so he thought, but instead, he reincarnated as a homunculus “cell”!? How is he supposed to survive in this strange culture medium!? In a world where monsters…