Kuusou Spin Flower

Romance School Shoujo

Let us search for fellow youthful club members for our mysterious club activities! Because of her father's adventures, Miku is entering school 3 months late. As such, she's petrified of being excluded and not having friends. He, the school special's extracurricular "finder," gave Miku an opportunity to make friends. And thus, somehow, Miku managed to join a club... (Source: Senpai Scans) Included one-shot: South South West

Q.E.D. iff: Shoumei Shuuryou

Mystery Shounen

Dash & Spin: Chousoku Sonic

Comedy Kids

Collection of several short stories, including omake (extra) koma stories, published as an anthology. The stories are often very slapstick. (Source: Wikipedia)

Hachimitsu to Clover Spin-off

Romance Slice of Life Josei

Story showing what happend some time after the events in the last chapter. Note: On hiatus.

Kurosagi Shitai Takuhaibin Spin-off: Matsuoka Kunio Youkai Taiji

Mystery Horror Supernatural

Spin-off taking place durning Meiji period around 1897.

Gugure! Shigaraki-san: Gugure! Kokkuri-san Shigaraki Ojiisan Spin-off

Comedy Shounen Supernatural

Kono Subarashii Sekai ni Shukufuku wo! Spin-off: Kono Subarashii Sekai ni Bakuen wo!

Comedy Fantasy Supernatural

A spin-off of Kono Subarashii Sekai ni Shukufuku wo! that focuses on Megumin and Yunyun taking place before their respective appearances in the main series.

Kono Subarashii Sekai ni Shukufuku wo! Spin-off: Kono Kamen no Akuma ni Soudan wo!

Comedy Fantasy Supernatural

A spin-off of Kono Subarashii Sekai ni Shukufuku wo! that focuses on Vanir and Wiz.

Biblia Koshodou no Jiken Techou Spin-off: Koguchi-san to Boku no Biblia Fight-bu Katsudou Nisshi

School