An anthology comic of Machikado Mazoku by various mangaka.

In a world where human civilization has collapsed and fishfolk have proliferated, a single human girl has turned up. Posei of the fishfolk, who believes in the legend that consuming a human being grants one authority and power, intends to make a meal of the girl, but… (Source: MANGA Plus)

The story takes place at the renowned private school "Nanahoshi" — also known as the school of the survival of the fittest. The school is famous for its incredibly skilled students and its nationally acclaimed achievements in various extracurricular activities. At the very core of this system, however, is a strict ranking system that is used to manage the students and reduces them to collections of numerical ratings of their abilities, from their intelligence to their looks. This school has an absolute ruler — a girl called Erika Kagurasaka, leader of the "Urban Lion" faction and holder of the title of "Pride." With the perilous ambition of defeating her and ascending to the throne as a tyrant, Kana Fujishiro starts his quest from the lowest possible rank...

After the fall of civilization, a hierarchical society was born where blood determines everything. The rich steal both the blood and lifespans of the poor, rejoicing in their eternal lives. Nagi is a commoner doomed to an early death, while Saya is a royal gifted with eternal youth. When their unlikely paths cross in a twist of fate, their innocent love sets the gears in motion to tear down the walls of a society built upon tremendous inequality and discrimination.

*Note: Includes 3 extra chapters, 2 of which are from the digital version.*

Sakugi Mitsuaki is a poor college student who gets hooked on figure modeling. In return for helping his class he receives some special putty -- but the figure he builds with it suddenly comes to life. The figure is a life force called Orichalcum ("Oriharukon") that fulfills the wish of its creator. Their strange life together begins From mangaupdates.com

Chikage Komori is a new transfer student, but she's never come to school. Hiiragi lives closest to her address, so he's assigned to bring her the schoolwork. But the first time he meets her, Komori suddenly asks him to have sex with her! It's a throbbing sexual awakening love comedy! (Source: Shonengahosha, translated)

The young man's new apartment is haunted, but as it turns out, even the dead have their own personal shortcomings... issues of the flesh included. For the dead have lingering desires and are more susceptible to the world of the living than what one may think. There's anger, there's hate, there's curiosity... and there's love too. Here he finds a ghastly girl who observes him quietly, certainly desiring something...

You have the sexually curious imouto, the erotic school nurse, and the cute, over-protective parasite that comes out of our MC Karato’s stomach.

After being awarded the Nobel Prize, child prodigy Alice T.P. Riida runs away from home and creates the first Artificial Human, Ninomae Shii. Along with Shiratori Jiyun and Kurosaki Yaoki, Shii now struggles to find out for what reason he was made for.

A Yuri anthology focusing on romances between masters and servants/lords and retainers, some include period settings or fantasy themes.

Finally, he gets to live in a place of his own. But as he was settling into (adult) single life, he realizes that there's… "something" else in the room!? (Source: Manga DX Plus, translated)