 If you liked
Tokyo Ghoul
|
 ...then you might like
Gleipnir
|
Both feature MCs struggling with the morals of hurting others to protect their friends and those close to them, and coming to terms with the fact that they are monsters and can no longer fit into regular society. Whilst there are differences in the details, the general emotional and mental journey the MCs take are very similar, although I believe Tokyo Ghoul does it a decent bit better.