Actions speak louder than words. The author includes excessive explanations that are unneeded and do not push the plot arcs forward. Each volume is super short about 6-7 chapters, 140+ pages (1.5 spaces). Too many conversations, eating, traveling and at most one fight per volume. Lucius finally died, but Rio left the evil magical sword in hand of Duran a new antagonist- enemy.
There is still no reason to protect or save the Beltrum sisters. And yet Rio has saved Flora 6+ times, Christina 3+ times without seeming possible that the author is getting tired from repeating and repeating the same things until the end of time.
Rio says that Celia would be happy but Celia does very little if at all for Rio or his retinue. Beltrum gave a house to Celia, but Celia is living at the #1 Boulder house with Aysha (human spirit).
There are no other plot arcs. Rio went all the way to Proxia and didn't even burn it down, much less kill Nidoll, Lucius, Reiss or the rest of that place (that has done so many terrible things to all of the rest of the kingdoms).
Rio no longer has to hide his Rio name and yet is an honorary knight with his former life japanese name. Rio has no responsibilities, hold no job, has no more purpose and yet the light novel continues.
Aysha killed Reiss but it wasn't really his body but a monster clone. Aysha since she woke up has basically been a babysitter and Rio since he started studying is basically the servant of a lot of corrupt and depraved servants.
The "heroes" are weak, the knights of the different kingdoms are even weaker and the only strong ones are the evil antagonists that never ever die. Lucius died only after close to 12 years of creating a hell in that world. Reiss never dies and is smarter and stronger than the rest of the characters in this senseless series.
Author prioritizes weddings, relationships, shopping, clothing, bathing and eating, that actually moving the plot arcs along or saving this hell of a world. The weakling heroes want to return, but have no way to return, and Rio because he died in his previous life, has no purpose in this current life (as Rio, the son of Zen and Ayame).