Ngl, I put this off because my expectations were low, but oh my lord THIS, this right here, is just wonderful mc is similar to the protagonist from Mage & Demon Queen (aka a relentless masochistic simp) only the love interest is wayyy more tsudere but she gets cuter as she starts to fall for mc around ch.5/6. Also its isekai!
ch.7
I Favor The Villainess