Review Detail of Perfect_It in Assassination System

I can't suggest you read this. The characters are two-dimensional, villains and the MC both. The MC is an idiot suggested to be a clever reincarnated human from Earth however. He's using an assassination system however the novel we thought we'd get, after about 25 chapters devolves into a 'RUTHLESS ASSASSIN MC' falling for a divorced woman with a daughter used as a sex slave and made powerful for no god damn reason.