Note: Dropped after reading ~1.2 volumes. In one word, this LN is exhasperating. The author is trying way too hard but without giving it any substance. The story tries to incorporate meta-elements, where for example, the characters discuss their possibilities as related to existing in-world Isekai LNs, without going anywhere with it. In fact, this gives more the impression that he doesn't dare move outside the box since every scenario that happens is in line with the Isekai LNs. And indeed, he almost immediately designates the stereotypical tropes to all characters, e.g. the dense hero/MC, bashful tsundere love interest, the hero's 'rivals' as personality trait, etc. Theformat of the novel is something like:

> MC: *Does something completely unnecessary and knowingly over-the-top*
> Character A: "OMG how did you do that"
*2 pages of nonsense jargon narration 'wow I was simply using the basic Teichmüller-Mochizuki theory of Kabbalah spaces as discovered in the secret Sanskrit spheres of 14th century Indo-Europe' blah blah*
> Character B: "No... that's impossible"
*2 more pages of jargon interlaced with stories of his intergalactic Earth-Church battles*
> MC: "It is incredibly important to me (for some inexplicable reason) that no one learns about how OP I am, I will now wipe your memories"
*2 more pages of memory-wipe jargon and how it was impossible to not know he was being over the top*

Further, the MC does things that are inherently opposite to his intention, and also, jumps through hoops to explain his inexplicable actions. For instance, he doesn't want his Earth-friends nor the Isekai-people to learn that he can use magic. For some reason, however, it is beyond his grasp to pretend to learn together with them despite it being a completely normal possibility and instead his long-term plan seems to be to never show that he can use magic (???). The other 'normie' in the group already learned magic in a week so it doesn't make sense. Further, he doesn't want to stand out in the Isekai-world with his magic, so instead of just performing covert actions (which he is clearly capable of doing), he leads on and demonstrates his full powers whenever he can, then forms contracts or brainwashing to cover his tracks, only to then actually let people still know about it (???).

In short, this LN does nothing new, and reads like yet another chuunibyou fantasy.