While the manga is good-average on the isekai genre, the dense MC trope is too heavy on this one, almost insultingly so, insulting because it's so false, so fabricated and forced that feels completely artificial, there're also many discrepancies in his behaviour due to this forced obliviousness and that worsens the story overall. Aside from that the idea of MC's power is good and Rita being a demi was kinda expected after so much smelling.
Thanks a lot Sweetie Scans for the Hard Work ^.^