http://www.mangago.me/read-manga/juujika_no_rokunin/
http://www.mangago.me/read-manga/the_boy_of_death/
http://www.mangago.me/read-manga/the_devil_s_boy/?XMcY
i suggest the first one. In my opinion its the best one there
This one's good too
http://www.mangago.me/read-manga/life_completely_ruined/
Your Throne : https://www.webtoons.com/en/fantasy/your-throne/list?title_no=2009&page=1
Have female mc
Mangago have illegal updates but with the different name.
Maybe it was 'I want to be you even for a day'
Is there any comic where the mc came to revenge? Maybe he/she got bullied in the past or something? But i need an mc that truly did the revenge, not the one who forgive or make the same mistake. Mc that has no mercy?(⊙…⊙ ).