hm just from the summary i imagine he's gonna get some kinda god complex unless he can 'only' punish ppl who make the first move against him/karma versus just indiscriminately cleansing his classmates
Edit: Oof poor doggy, no one would blame him for going john wick on everyone now
(I mean, i doubt anyone else will know how his 'key' works but i assume unless he's granted strength on top of that, other than that one surprise move, seems like something he'd be robbed of versus it 'fused' into his body and he 'uses' it by just using his fingers on someone's forehead bc i imagine unless they're too scared to get 'revenge' on him i can imagine they'd try hurting him again)
Fine what what it is tho surprised an official site picked it up b/c i wouldn't be surprised if there are 4-5 copies of this kinda story even if this isn't as more revenge sexual fantasy like that ntrevenge series XD
i wonder if this will end with him using the key on himself if not the guy who 'gave' it to him collecting his soul at the end