Omg! I accidentally hit the x on my boom mark and I lost this great manga of as devil who ...

I've never read this so idk if this is it but yea
http://www.mangago.zone/read-manga/mr_villain_s_day_off/

Is it this one?
http://www.mangago.zone/read-manga/mr_villain_s_day_off/

i dont know the manga but if that ever happens again clicking control shift t will bring the last tab you clicked out of back

i think it's this one, it's pretty similar to what you're describing.
http://www.mangago.zone/read-manga/mr_villain_s_day_off/

Thanks everyone!