example: MC gets called to kingdom to receive reward, and turning down the king's invitation would be like a slap to the king's face in front of the kingdom. Okay, author is setting up a flag: MUST attend king's summons to show respect before the kingdom thereby starting to adapt to the power structure of the world. New harem gal gets introduced as an oracle working for temple and government for years. Oracle gets imprisoned for not telling higher-ups the whole vision just once in her career without being given a chance to explain and is automatically charged with treason... seems overboard for someone who has been serving the kingdom their entire life being charged by the person everyone in the temple knows is a sleazebag... aaand, it's a pathetic damsel in distress setup...
MC rescues the oracle at the request of another harem member in the making (a princess of course) and is given some gold as his main motivation to help with a side of "it's your fault she's in this position even though we're not sure how"... oh, and the king's summons announced to the whole kingdom as a reward that CAN NOT be refused? Eh, the princess will handle the explanation to the king somehow (off camera).

The City of Turku is good since it's a large town and it has an adventurer's guild branch.
Eclair and Oldega are already members of the adventurer guild, so this time Takeru, Feene, and Leiria will register as adventurers.

I took two days on foot and came to Turku city.

"Dark arrow"

a guidable black magic arrow targets Leiria.

Leiria defended against it using Aqua Wall.

Vikbart increases the number of fire bullets he release and also added more magical power to each.

Leilia also increases the number of water bullets accordingly.

And dark arrow again.

After rescuing the damsel oracle without a hiccup the team is followed and ambushed by assassins who moonlight as adventurers (as cover) while on their way back to their tower. Okay, I'll admit that is clever, use the adventurer guild as a cover to bounce between countries for assassinations. Of course the assassins never saw the OP MC crew coming and got steamrolled, understandable. MC and friends incapacitate all of them without killing them due to OP statuses, fine. Now what are you going to do with them? You were just advised by a princess to stay out of the limelight and away from politics for your own sake AND the sake of the oracle you just saved, you get attacked by a group after a clean escape, beat them up, leave them alive after knocking them unconscious (because bipolar "no killing humans" morals have suddenly emerged in all characters) and then... what?
Nothing

Nothing is mentioned of the assassins after that. One would think that maybe an interrogation is in order, or hauling them to an adventurers guild for attacking fellow adventurers, or even something simple like being locked up in the tower or an execution to tie up possible loose ends but there is literally NOTHING mentioned as to their fate. All that can be assumed is that they were left alone to wake up and report their failure to their superiors... as well as the identities, incredible powers, and direction of travel of their targets... defeating the whole premise of staying out of the limelight/politics while protecting your ward; All without ever learning who attacked you or why. Do you think I'm blowing this out of proportion? Here's the actual fight ending:

Gaine's head was strike in its crown while he's having a surprised face. Takeru controlled his sword to only beat him and the enemy fainted.

Having defeated the national rank party "Grim Reaper" led by Gaine, Takeru's party hurried to the tower.

A few chapter fragments later MC and company are now killing "small fries", even setting them on fire because, why not? (humans mind you, not demons or raging beasts or undead, living HUMANS), yet bother to defeat the bigger named enemies without actually killing them or clarifying what happens to them AGAIN other than "surrendered" or "passed out". Yeah, that makes sense, let's mercilessly slaughter the little nameless thieves and robbers because they are tr*sh, but leave the gang leaders to do whatever they want after we beat them (and for whatever reason don't bother arresting, imprisoning or executing them). But whatever, I'm sure they all changed their ways after getting their @$$es handed to them, or took themselves to the nearest town to lock themselves up because that's what all criminals do when they're beaten and let go right? They don't reorganize and r*pe, ens*ave, mu*der, pillage, and burn ever again right? That'll never come back to bite you after announcing to them who you are and where you live.

MC then goes about making his tower even bigger to the point that it becomes easily seen from outside the forest despite a heads-up from the tower interface beforehand saying "hey, everyone is gonna be able to see us, maybe we should wait" MC basically says "Eh, it was bound to happen eventually" completely ignoring the warnings he had already received and pushes on because that's all he knows to do. Make tower bigger, get stronger and repeat.