20+ CHAPTERS MANGA WITH 9.0+ RATINGS

There's an anime adaptation.

Tenjou Yuuya has been a bullied boy since the past.
He lives in the home of his beloved grandfather while he goes to school. As usual, he receives a harsh bullying, and he takes an extended absence from school to have some time to heal his wounds.
While on this long time of absence, he takes the opportunity to clean his grandfather's house and goes to a room he never went before, where his grandfather keep many different objects that he gathered...

There's an anime adaptation.

Sano Yuji, a black company employee, is summoned to another world while finishing his work at home. His profession in the other world, a Monster Tamer, is considered a job that makes it difficult to become an adventurer. However, thanks to some slimes he met, which read several magical books, he gained magical powers and the second profession, Sage.
Yuji acquired overwhelming power, but is he conscience of his strength? Blindly becoming unparalleled...

Shu, who died of old age, reincarnated as a baby in a different world where he was picked up by a poor orphanage. He quickly grows up under the watchful eye of the gentle director and staff. With skills received from God, he starts to exert talent…
He now lives at his own pace, adventuring with cute monsters and good friends?

After a god screws up and accidentally takes high schooler Shou's life, he offers him reincarnation with a gift to make up for it. Shou asks to retain all his old memories for the new life. Shou is reborn as Will, a noble's son in a world where magic use is common and involves knowledge of kanji characters. With all his memories, he's a brilliant toddler, and when he experiments with magic, he finds that he has an amazing talent for it! What's more, though he was smart but unloved in...

"I can't save the world!"

30-year-old Tsukina was summoned to another world by a sphere that calls itself "God." In return for granting any wish, God tells her to travel to another world as their "Savior" and bestow peace upon the land. However...

High school girl Akari mourns the loss of her mother who died when she shielded Akari from an oncoming truck a year ago. She discovers an adventure game her mother had gotten for her birthday some time ago, but never had a chance to finish. Suddenly, she is summoned to be the mother of the Demon Lord's 10 children in another world...

Sei, a 20 year old office worker was summoned to a different world after finishing some overtime work. But the person who had summoned her looked at her face and said, “This is not the Saint.” Is this neglect play!?
Sei left the royal palace and concealed her saint title. She started working at a laboratory where she made potions and cosmetics. She used her magic to grant people’s requests and slowly people began suspecting that she was a saint…
Can Sei enjoy her slow dreamy different world...

She worked herself to death in her past life, but then she was reborn in another world as the villainess Ronia! As expected, her engagement is broken and she's expelled from society, but now she takes that chance to live peacefully, and even opens a cafe with the help of her fairy comrades, which is becoming unexpectedly popular with beast-kin...?

Mukouda Tsuyoshi, summoned from modern Japan to a different world of sword and magic.
He thought of what kind of a huge adventure was waiting for him, but actually, Mukouda is just a civilian who got caught in a Hero Summoning!!
And that Mukouda's base status shabby compared to the legitimate heroes (There's even three of them)
On top of that, the king who summoned Mukouda and the rest were suspicious, and Mukouda left the castle by himself...

"I'm terribly sorry!"
A god was suddenly prostrating in front of Kayano Takumi. He was apparently killed by a mistake. Moreover, he can't be reborn again. However, according to god, he would be able to live in a different world, but he made a mistake again and transferred him into a dangerous forest... where he finds a pair of children and decides to take care of them.