Jinrui Saikyou no Hatsukoi

The second instalment of the Saikyou Series. Aiming for 10,000 metres depth in the deep sea! Together with the genius psychologist Jikumoto Miyori, Aikawa Jun—a contractor—heads to the bottom of the sea in pursuit of a missing treasure ship and research team. As soon as they arrive, they are besieged by a school of man-eating fish! (Source: Kodansha, translated)

What if Monogatari's Ararararagi, Zaregoto's Ii and Jun "Humanity's Strongest" Aikawa, and Okitegami Kyouko no Bibouroku's titular forgetful detective all attended school together? In 2002, NisiOisiN won a Mephisto Prize prize for his debut novel Zaregoto, Book 1: The Kubikiri Cycle. Part of the 15th anniversary celebration will be 4-panel crossover gag manga Seishun Kijin-den! 240 Gakuen (240 is a pronunciation pun - 240 can be read as "Nishio," so "Youth Oddball Story! Nisio Academy"). (Source: Crunchyroll)

A series of crossover stories between characters from Monogatari and characters from Nisio's other works. Originally, 4 crossover short stories were released during the theatrical screenings of each Kizumonogatari movie. The stories were bundled up into Mazemonogatari, and included 3 unreleased stories. Includes 15 stories: Kyouko Balance Jun Build Nomi Rule Mayumi Red Eye Kuroneko Bed Risuka Blood Hitei Clear Iori Fugue Shiogi Ranger Akari Triple Rizumu Rock 'N' Mikoko Community Kuu Invisible Rai Roulette Magakoro Finisher