The following story and all of it's contents are not meant for the faint of heart.
If you are reading this because you think it will be a cheerful tale about getting revenge you are sorely mistaken.
This is a tale of extreme revenge nothing isn't to far and as the various revenge plots progress the MC will get more and more sadistic and vile.
Since many of you will ask I'm not planning to release the entire backstory all at once as a prologue or anything, it will be released bit by bit throughout the story as the main character himself does not want to remember his own past, only doing so as he succeeds in getting pieces of his revenge.
The reason for his getting a system will be explained but not for quite a while so stop asking as it will be explained later on.
Why a dual system?
 - A: Well it is because this is planned to be an R18-style story but not everyone who the MC encounters is a target for his revenge they will still have a place in the story and since they are already being tied up in the plot why not give the MC the chance to give them a second chance they like he has been equally betrayed and so should be given a reward for their suffering. Hence the lust system is the duality of the revenge system, which allows the MC to slake his lustÂ
While this piece of work is being Authored the views and actions conducted within are not the real life actions or desires of said Author and are meant entirely as a form of entertainment, if you have a problem with the chosen writing i'd thank you for not shaming those who do enjoy this piece of work.