After dying unexpectedly, Aiden is transported to the Demon Slayer universe and gifted a mysterious demon-slaying system.
Bound to the sentient Demon Blade Senjin, Aiden adopts the name Kenshi Tanaka to survive and accomplish his goals.
Takumi got hit by the all mighty truck-kun, died then got isekai in the world of jjk, but a tad bit diffirent.
The majority of the world is female.
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I really feel like posting something so he