Perfect Crime volume 1
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This was quite a cringe inducing read.
The basic premise is that the dude on the cover uses his abilities (getting people to believe something is real) to kill people. He can convince someone the plastic knife he's holding is real and "stab" someone, so that person, believing they have been truly stabbed, die. Or make someone believe they have been poisoned and they die.
He does it because he likes to see people's misguided desires bring them down and break them.
The cringe obviously comes from the motives of these kills and events. For example, one of the last chapters in the volume (maybe the last chapter in the volume) is about a young mother that wants him to kill her infant son because she's young and having to take care of the kid isn't letting her live her own life (for example she can't get a shitty dude to come to her home and fuck her because she has a kid, oh poor lady) and her own mother won't get off her case. He accepts the request and tells her everything is ready, and once everything is set in motion, the young girl is the one getting killed. Unbeknownst to her, the main guy doesn't kill kids (because they don't have desires they can tell him so he can't have fun in seeing these desires breaking them down) and the girl's own mother hired him to kill the girl so she could get the kid (she's a professor who wrote a book on how to raise kids) to raise him however she see fit. Since our MC likes to see how these twisted desires break people down, he leaves a nice suggestion on the old harpy and she now sees the kid's face as a crying blood twisted face asking her to give him back his own mother.
So, the material of the chapters, which all deal with different characters making requests, is always in the opposite category of feel good stories. While each chapter deals with a different person making a request, there is something connecting them all together, which is a policeman investigating Usobuki (the killer) since he knows he's the one that made her superior kill herself and is bent on finding out how he manages to do it and making him pay for it.
I'll be honest, the way Usobuki likes to toy with people had me think of
Tsuyu