cliche plot - "Japanese" (always) person (this story, 20's something single salaryman male who happy with his life) get force transport into another world (mostly RPG like world with magic).

purpose for transport (different from novel to novel): for this story is to balance world magic through Dungeon and getting people or monster in there.

main character (male, forever 18 year old in the new world): Let me tell you what this character is "NOT"; he not a some immature wannabe hero character but the thing he do make him look like a hero in the eye of other that are close to him. He not some vile villain but he can be a bad guy when need to. The main character is closer to a businessman father figure type who think and judge thing in gain and loss like way.

I read ahead a bit using google translate on the raw so I know a few more stuff.
Stuff/theme/topic that people expect or not expect in this novel:
Murder and/or Killing: whether in war or battle, this is written openly. it is a fantasy world.
Rape: written as afterthought but not shown, such as the event happen and they just spoke of it.
Sex: This is imply. <--before the Web chapter 332 author's comment (Extras Note: The author add a personal comment for reader right After web novel chapter 332 that he/or she may or going to add "sex" in the future web chapters so I'm guessing the author is warning reader ahead of time.)

I think the main character is somewhat a anime otaku because he want MS or AC.

Here some interesting spoiler that going show up later in novel about stuff happen around the MC:

main character vs elite troop; well you know the result since that chapter already translated.

MC vs trolls
MC weapons: armor vehicle
result: must I say more; lol moment here

main character vs 2 self-proclaimed diva of Maou
main character weapon of choice: cage
result: main character win, wannabe divas captured

main character vs Loli Maou
main character weapon of choice: NO Spoiler for you here
result: main character win; Loli Maou captured (in less then 5 min.)

MC vs his own wife's
let say the MC need to protect his "body" from being "eaten", "if you know what I mean"
Result: none, hoho

Now the MC will not put his hand on any female even if they willing until after his marriage for three reasons. Two minor and One major, the 2 minor reason will be explain or imply early if not already in the translated chapters. The one major reason which is the most important one will be stated and explained as well as resolved on the same chapter before the chapters of his marriage of his many future wifes. The major reason will not be stated nor imply until that chapter so here a hint from me who read ahead on google translated: "His races/species"

Here a MC wife count, where I'm currently at in my google translated read:
Former Slave: 10
Princess: 2
Former Saint: 1
Maou: 1 [former human princess who transformed/become into a feared Loli Maou until meeting our MC]
Servant/Maid: 1
Female Knight: 1
there more to come but I end my spoiler here

I hope this enough spoiler for people to read this novel.

So far the story is pretty interesting. The translations are very good as well incorporating some Japanese references. Are protagonist can be considered cool headed and very adaptable to the situation. Overall the story is going in a good direction by my standard.