I've some concerns with the abrupt setup and lead-in.
It's par for the course for JP media to crash the plane in the first chapter as hard and fast as they can to set up a hook. But it also is a bad sign for worldbuilding and story development. And I don't see the "adaptation" tag to preview the WN/LN to see if it had any sort of editorial review, or if it is an original work they're making a ground-trope-sausage out of.
Publisher should instead take a few chapters (1-5), draw out a coherent introduction, then publish them at once. At least then that provides opportunity for the author to do some meaningful development. And serves as new work promotion material.
For example I'd like seeing artistic chapters depicting his despair in captivity, background a bit, lead-up of events -- and slowly show how princess saved him (figuratively). Perhaps 1-1.5 chapters showing their actions together immediately with her. Not just "knocks the doors down and I can hear her voice trembling". Maybe even show how his sudden disability of blindness affected a sighted individual.
Focus on T&A in first chapter isn't helping though. And that's spoken as a guy who enjoys glorious PLOT.