Redemption of the Yandere Villain

"Your sin is your very own existence."

After dying Eugene reincarnated on earth and live his life atoning for his past life sins. When he thought that he could finally rest after being killed by his childhood friend ― he came back to his original world as the second young master of the Marquis Household.

Having fear of being alone.
Being locked in the darkness with nowhere to run.
And living an endless cycle of torment.

When he thought he couldn't be saved ― someone actually extends his hand to lift him from the darkness? He couldn't believe that there's still redemption for a heartless villain like him.

[WARNING]
1. Contain same-sex relationships. If you are sensitive to this kind of story please leave, thanks.
2. Mention of rape [No definite action describing was done]
3. Age differs from Mentality [Characters are 10 years old that is considered teen in the background setting.]
4. No underage relationship [Romance starts at adult age, no "x" scene of minors]
5. No grooming intended [In past life characters only have a 5 years age gap. Attractions are not instant but develop little by little.]
6. Mental Illness Awareness [Characters are all possessive and obsessive which will be explained through world background as to why people in that world are twisted.]
7. Mention of Necrophilia [No definite action describing was done]
8. Super-Slow Update [The author have studies]
9. Two-way background setting.