 If you liked
Kimi no Knife
|
 ...then you might like
Bastard
|
Both main characters aim to protect a girl, both definitely under the 'true crime' genre, both mc's kill for less 'conventional reasons' i.e. revenge and instead kill for deeper reasons e.g. Shiki to fund his sisters treatment, Jin because his father makes him. If you enjoyed kimi no knife you will enjoy Bastard because, IMO, Bastard is better written.