A deadpan office temp dies shoving a kid out of a truck's path — and wakes up reincarnated into a dark-fantasy world as a Shadowborn: glowing violet eyes, an umbral blade, the power to melt into shadow. One problem: the System rates him RANK F (a deletion sentence), his only companion is a sarcastic shadow-cat with no spine, and the universe keeps sending monsters, smug cosmic managers, and an S-Rank deleter to erase the glitch it can't close. A self-aware comedy isekai about being underestimated by your own user manual.