Re:Zero kara Hajimeru Isekai Seikatsu, Tate no Yuusha no Nariagari Recommendations
-Both involve the protagonist being transported to a similar type of fantasy world, in terms of magic, architecture, etc.
-Both protagonists quickly realize that this isn't the fantasy world they dreamed of through betrayal and tragic events
-Both have a large cast of similar female characters
-Both protagonists will 'save' these females in one way or another causing a friendship or in some cases attraction to develop from the female's side