An anthology of Yuru Yuri by various mangaka.

Dungeons appeared in the world five years ago. Police and military are unable to enter these enigmatic spaces, and entry is permitted solely by the free will of individuals aged 15 and above. Leveling up is possible, fantasy items can be acquired, and for some, the transformation can lead to becoming astonishingly beautiful. Yuuta Rokujou has lived a life of being bullied since his kindergarten days. Due to this, he decided not to attend Dungeon High School that everyone else went to, rather, on his fifteenth birthday, he decided to challenge a dungeon alone. This story is about how Yuuta, under such circumstances, became stronger than anyone else, becoming one of the twelve individuals capable of moving the world, known as the ‘Twelve Heroes.’ --From MangaDex

The main character who got worked to the bone as a corporate slave office lady in the current world got transported to another world, where she became the pet of aberrant head-san. Although they both hold romantic feelings towards each other, it's hard for them to develop their love with their difference in species standing in the way.

This is a mysterious hot spring where Yokai from all over Japan gather together. Izumi Onsui, a first-year high school student, reunites with a Yokai girl at a hot spring run by her late grandfather...!?

Dan was “the strongest and bravest” when he was young. But because of his lazy life, he is now a divorced, unemployed old man! He tries to earn money through quests for a living, but age has taken its toll on his strength and all that! He was approached by a silver-haired elf, a handsome man, and an S-rank adventurer… a young man of today’s generation!

Xiu Xian died and, upon waking up, found himself transmigrated into the body of a cowardly illegitimate son from a cultivation family. Without spiritual roots, he couldn’t cultivate, and the head of the family despised him. Almost anyone in the household could easily humiliate him. However, he acquired a “Female Disciples’ Leisure System.” As long as his female disciples cultivated various leisure skills like cooking, painting, blacksmithing, weaving, and construction, Xiu Xian would gain experience points. As the disciples improved their skills, they could even develop all sorts of incredible cultivation techniques—like eating food to restore health bars… (Source: Bilibili, translated)

The tales about the daily struggles of demons.

Sato is a high school boy struggling with his grades, but that's the least of his worries. His childhood friend and former upperclassman Waseda Todome wants to spend time with him (the keyword being "former", as she's repeating the first year and now shares classrooms with Sato). The problem lies with the fact that, while being cute and flirty, she's dumb as bricks, and intends to make him sabotage his own grades because she doesn't want to be alone at the bottom of the school's grade ranks. However, it turns out that she's dumb as bricks when it comes to that too... Todome's poor planning has some unintended consequences, as it readily reveals that her intentions with Sato do not lie purely within the academic side of things... Will Sato take the hint, notwithstanding Todome's bad clues? *Note: Includes 4 extra chapters.*

"I am never gonna fall in love with a man." That's what Ayumu said in front of Makoto back in middle school. But when she met her again at the class reunion, she seemed happily married with a smile on her face...!?

During a time of chaos, superheroes appeared, and the world became peaceful once again. Two brothers who admired the so-called "Earth’s saviors" vowed to become heroes together, but in that world, people are categorized into groups of "Heroes" that protect, and "Mobs" who clean up the mess after. The younger brother Hiiro is a "Mob", while the older Ao is a "Hero". However in times of crisis, especially if their childhood friend Iruka is involved, Hiiro will jump into danger without hesitation!

To combat rising attacks by communist terrorists, Japan has created a special security force authorized to use lethal force. Angel, the newest member of the force, fights to take down the terrorist group, Red May. Accidentally uncovering ties between Red May and the government, she and the rest of the Special Security Force are targeted for execution by 3 "hunters", enhanced psychics, working for the government. Together with her cybernetically enhanced partner, Raiden, it is up to Angel to stop them.

A romantic comedy given by the sword of the evil!! The secret of Hikari, a student council president who has excellent grades. That cannot be changed because of their illness. The hero who knew it had to help her change!