If you're looking for manga similar to Peter Grill and the Philosopher's Time, you might like these titles.
The story of the former hero Loki and his time working at an onsen with his monster co-workers!
The Jester. More commonly known as the ‘Playboy’ Dylan, was fired from the party of the Heroes. The self-centred Heroes didn’t understand Dylan’s importance to the group. They were just a group of one-man teams. Not interested in cooperation at all. Any failures are blamed on the jester. Dylan, who was disgusted with such companions and was sick of playing as their comedic foil, happily accepted being kicked out. The Heroes didn’t know that after saving them many times over with his magic tricks, the level 99 jester can change his job title to that of a ‘Great Sage’. “Life, how about a rewrite?” He’s done being the clown. From here on out, he’s going to take the leading role.
Arc, heir to the throne of Nagara, and his harem of beautiful women may be the only thing standing against the end of everything. The world has been corroded by darkness and debauchery, but the mysterious and sensual Dark Elf Lati offers Arc the power he has long yearned for to change his fate.
In the year 2020, it was found out that a harmful virus had infected the human race, killing them slowly and bringing them towards a dark future. But with the technology they had in hand, in an attempt to save the civilized race, the people chose to go through with "Beast Transformation." Knowing that other than humans, all animals were safe from the virus, the humans made the decision to inject the genes of animals into themselves to become part-human, part-animal." With the race known as Homo Sapiens gone, by the year 2035, being a beast-human was normal. In this new world, one strange boy, Kokuryuu Kazuto, 14 years old, is the worst runner and least athletic, but somehow also the most popular, with girls giving him hugs and boxed lunches, to his chagrin. But one day, he's approached by three girls, members of a group called the "Pure-bred Special Ward," who claim that Kazuto is actually a human, who should not even exist.
When twenty-something Kurusu Kimihito became an involuntary “volunteer” in the government homestay program for monster girls, his world was turned upside down. A lamia named Miia was sent to live with him, and it's Kimihito's job to make sure the sexy snake girl integrates into everyday life. In this novel spin-off, a new program hopes to give monster girls experience in the working world–leading to sexy uniforms, on-the-job shenanigans, and all-new hilarity!
A married hero keeps having monster girls coming after him to steal him away so they can bear children of heroic lineage. The hero's wife chooses to deal with the monster girls herself.
One day, a forever D-rank middle-aged adventurer, Lucas, pulled out the legendary Holy Sword in a drunken stupor and became the strongest! Ever since that day, Lucas’ fate was greatly changed forever. Seeking love and to sate his desires, the reborn middle-aged adventurer's real adventure starts now!
Shinjirou's brother is a brilliant scientist whose chosen career is making weird cell phones. Shinjirou has received a gift of his brother's latest product, the Doll-Phone, which is a walking, talking, tiny girl who doubles as a cell phone. But he can't help feeling that a phone like that seems kind of perverted to use...