After I was kicked out from my adventurer party, I lived out my retirement in the mountains. However, my disciple became the strongest human in the world without my knowledge, which started the rumor that her master could only be the ultimate strongest person, eclipsing humanity. Hence, I now occupied rank one on the adventurer rankings. An aspiring student, a dragon, a hero, and a demon lord all came flocking to me, completely misunderstanding everything. Please stop. I'm just a small fry, okay? This is not a story about an OP MC. It's a comedy about a bunch of idiots who think I am. (Source: Shousetsuka ni Narou, translated)
Remake of the original series from 1973. The manga follows a man named Kazuryuu. Kazuryuu's mother, who was murdered, left him with a memento of the mystery of the "sculpture of the nine-headed dragon." Kazuryuu becomes a medicine seller and an assassin named "Baiyaku" in order to travel Japan and find out the secret of his birth, his name, and his mother's murder. (Source: Anime News Network)
Nine spends his days as a vanguard in a party that found him, but he and his beloved cat, Enu, are forced to do all the chores. However, one day, the leader sells off the black sword, a memento of Nine's father, without permission, and uses violence against his precious Enu and Nine's patience reaches its limit! "I'm quitting now!'' Nine, determined to leave the party and start a new life, is suddenly confronted by an S-rank adventurer "Dahlia the Flash''. And then he is scouted by the strongest party on the continent, "Red Hawk"...? Source: MU
Kanon and Itsuru both have a power that allows them to infiltrate psychological worlds called "zones", and are contracted to kill the conceptual lifeforms known as "phobias" that nest in people's minds and bring about their morbid fears. One day, a young girl suffering with scopophobia (the fear of being stared at) comes to them and requests their help. Kanon enters the girl's "zone" and encounters a mysterious illusionist who fosters fear through storytelling. In the midst of fighting him, the illusionist poses a question to Kanon: "You're turning away from your own dark, ugly past, aren't you?" Thus this fierce psychological battle grinds away at her own mind, gradually digging up and exposing the truth she had wanted to hide at all costs. Hearts are broken and sanity is lost as the battle enters a realm stained with fear and despair... Source: Shogakukan
Satoshi Miyagawa, a manga artist who is worried about his own direction, decides to get involved with a private school and a male school. There, Miyagawa is baptized by the super-world of Otokojuku, and experiences all the specialties of Otokojuku ...! An unprecedented male school infiltration report manga starts here!
King Battler Jr., a first-year student at Otokojuku, nicknamed "J." The fists of this man who has defeated countless formidable opponents hold a hidden past!! Just before the Tenchou Olympics, what kind of deadly training did he undergo to hone his punches to the ultimate level...!? The Otokojuku spin-off, The Legend of the Strongest Fist, which was a huge hit on the manga app "Manga TOP," begins!!
From [LuffyNoTomo Translations](https://www.mangaupdates.com/groups.html?id=5281): Hazeru is a short cute guy, Genki is a good looking athletic guy, Kuuya is a popular hot guy and Ginjirou is shy but really good looking...what do these 4 have in common? They are all part of the science club! Hazeru is the club president & close friends with Genki, he is so athletic that he gets paid by the sport clubs for his talent in order to get their club money. Ginjirou is the one that does most of the experiments. Kuuya thought that Hazeru was a girl & hit on him but even though he likes girls he still likes Hazeru, so he joins as the club's model in order to get people interested in their science club.

