Marumikan

Isekai'd harem protagonist on that sigma grindset.

A "delinquent" who freezes up and says violent things when around women meets a small girl in the library when he's out studying. To his surprise, she tutors him, even though an elementary student shouldn't be able to. As it turns out, she's a high school student and his classmate; she's eager to befriend him. Also surprising to him is the fact that he isn't afraid of her. Could it be because he sees her as a kid? Or does he?  Mangaka’s Pixiv  Mangaka’s Twitter

A collection of side stories drawn by different artists based on the 4-koma series, Joukamachi no Dandelion.

In middle school, Watabe Fuyuhiko was a top student in grades and sports, and he was looking forward to a glorious high school life. Unfortunately, three idiots stand in his way. Morino Koharu is obsessed with studying, and surpasses Watabe in academics, but she's utterly clueless about everything else. Saotome Akira is constantly exercising, and surpasses Watabe in sports, but her self-worth is tied up with her skill in sports. Izumi Chinatsu, on the other hand, is an all-around failure that simply gets in Watabe's way. Watabe interacts with Morino and Saotome to learn their secrets, and ends up paired with Izumi against his wishes. The three girls are all lonely and friendless, and interpret his interactions as friendly overtures. It looks like Watabe's school life is going to be very different than he imagined!

This anthology features Alice in Wonderland-themed illustrations, comics, and oneshots. Some are pretty hilarious, others slightly disturbing, others rather cute.

17-year-old Saitou Ken joins the student council filled with otaku… specifically BL fan-girls…

Based on the Nintendo DS game of the same name. A kid with dreadful fashion sense pits regular dinosaurs against skeleton dinosaurs, alien dinosaurs, made-up dinosaurs…!

One day, Haruto Akihara, a high school student living alone, moves in with his classmate Rei Mikoto, an extremely beautiful girl! Rei, nicknamed the "Goddess of Ice", has a cold attitude towards Haruto, who is devoted to her, but gradually...?

Filling the void after Komorebi Village's conclusion, this follows the bumbling and hapless Topp and his band of mayor's assistants, Isabelle, Harry, Hamlet and Fuchsia.