She was in the 3rd grade of middle school, he was in the 1st grade of high school. She met him at the basketball match for the first time. He was so amazing, she fell in love at first sight and decided to enter the same high school he's going to. After she managed to get into Shuuei Institute, she expects her happy love life to begin but... what if the guy she liked was held back a year?! And what if he told her to "never come near him again"?! No worries, Tachibana Riri will not give up!

A thousand years ago, Enka, the god of destruction, died leaving a prophecy that its "child" would one day destroy the world. In order to prevent this, Operation Cozy Family is implemented in which the children who are potentially prophesied as the Child of Enka are suddenly forced to live together and take different familial roles.

This impromptu family contains children, human and otherwise, with an official of the bureau and a self-proclaimed goddess assigned to be the married parents of the household. The goal of Operation Cozy Family is to discern who the prophecy applies to, as well as to teach all of them all about the love of family in hopes of convincing the Child of Enka not to destroy the world. But with all families, there''s bound to be mishaps, and with this group, there's also adventure—with the fate of the world in the balance!

From matchlocks and cellphones to kimono and TV games, the cultures are blended, a modern Era with an “Inner Palace” inside the Osaka castle!?
The only son of the Toyotomi Shogun, Hidekage, on mission with the inspection bureau “Carrion Cafeteria – Vulture”, infiltrated this harem where pretty girls are gathered. However, the girls he saw there, were fighting for show, watched from outside an aquarium-like glass case. Those are not regular beauties! This is the start of a never experienced before forbidden school life!

From Dan of Population GO:

Ooba Asa woke up one morning and became an invisible man. It isn't just him, but various students around school have been gaining superpowers while his little sister has been losing the same powers. Supposedly the student council president is giving out superpowers, Ooba Amime's powers, so Asa, Amime, and the grudge-filled flame girl, Daimon Yaki, form an uneasy alliance to give the mysterious student council president.

From AQUA Scans:

"In an accident at the meat factory, the heiress was heavily injured. Guiltily, I agreed to her request, but this very same request have let me enter into a wonderful life..."

From Wikipedia:
Usagawa Rinne, a normal female high-school student, spent happy days with her lover, Sakaki Guryuu. However their peaceful days were suddenly shattered. On the night of Sakaki's birthday, Sakaki witnessed Rinne's death after her eye was gouged out by a girl named "Gankyuu Eguriko"...