Any mangas where the Mc who is a guy suddenly or goes away for a long time and changes his personality from being like weak and not confident to becoming the most badass motherfucker out there. Kinda like arifureta where mc goes through trauma and becomes badass. Or also kinda in mercenary enrolment like horrible shot happens to him as a kid and he spends year in the desert fighting and returns home a badass. Romance subplot or the entire thing about romance would be appreciated but not necessary. Seinen or shounen plz. Thx