I've read all the way to Arc 13. Yes.. i've read to the latest chapter and of course its in Japanese.
This is the story of a man who got transfered to another world and follow the general idea of 「what'll you do as a modern day human when you suddenly transferred to fantasy-world while you got blessed by godly power/abilities」.
He isn't a Hero who got summoned specially to fight Demons, he's just a passerby.
Well.. actually he's not too OP from the start. His only abilities are game-like interfaces (no one in this story's world has it) and adaptative power (he got Skills by learning how the Skill works or by getting hit with skills, a harder version of Re:Monster's MC's).
He's just 'happened' get transfered to some place with tons of high-level enemies and 'accidentally' wiped them all for curiosity's sake. Thus, he got tons of items and exp so he leveled like crazy. Exceeding the real Hero of that world's level or even the demon lords'.
But wait.. Rather than flaunting his OP abilities so he can get praised or even hailed as Hero by people around him or go around the world collecting girls/ladies so he can fondle them every-fokin-time, he choose to go adventure, go around collecting informations, doing some bad-ass things, getting new acquaintances, enjoying the world, cooking to re-create his own world's food (mainly Japanese's food) from the scratch, improving his OP power so he wont get people around him hurt by that world's enemies (demons/demon lords), raising his companions so when he's not in that world again they can at least stand againts their enemies, etc.
I love stories like that. No pathethic MC, no big-headed MC, no selfish-bastard MC, he's gentleman, not overly pervert who touch girls/women needlessly, hold dear his companions/acquaintances, and so on which made him like a saint. Well.. litteraly got the title.. lol
The author use some type of transferred to another world. Those who're reincarnated (like Mushoku Tensei or Re:Monster' MC), and Those who're summoned (Tate Yuusha or Konjiki Word Master). So yes.. there're many people that got transfered to that world. Each of them has different stories which get exploited later.
There are plots for those who're looking for plots. but if you expecting a 「the MC got defeated then doing some training to kick his enemy's ass for tens of chapter worth of training but eventually got his ass kicked again by his next enemy then repeat that to eternity」's plot, please look somewhere else. And they're not 'big plot' either.
If you look for tons of ecchi, too bad, dude. there're so few ecchi's scene in the story. no.. im not saying there's no ecchi.. just a few..
And if you saying he doesnt have goals, are you sure we read the same story? it's mentioned many time in the story, you know.
In the end, I think this story focused heavily on MC's adventure, his socializing into the world, how OP (bad-ass) he's, and especially, how people around him thinks (from another character's POV) about their situations.
Ohh.. about his Harem (for you harem's lovers), they're not only little girls/lolis. Though his travel companions are indeed little girls and a girl.
Girl? Yes.. Girls. He's in a body of 15year old boy. So what wrong with getting love interest from 12year girls from that world's POV? and dont worry.. he got love interest from those older than him too. I love lolis, but too much lolis isnt good either.
For me, this one got normal story (it's just a hyped "harem in another world"'s story, duh) but good at delivering them,
Good romance (sweet but not overly sweet),
Good jokes too (damn, that "wagahai-kun" is really good),
Some heart-warming scene,
Nice bad-ass scene too.
Sry for typo, or bad English. not my main or even secondary language. i can read English better than Japanese, though.