Since 1973, an invasion of aliens known as BETA upon Earth is driving human civilization into nearly collapse. Facing an enormous mass of enemy force, mankind has developed large humanoid arms called as Tactical Surface Fighters and deployed them to its defense lines through out the world. However, all those efforts could slow down defeats but could not stop BETA, and mankind is forced to abandon major area of the Eurasian Continent. For 30 years, mankind is bogged down in an endless war against BETA without any hopes of victory. In 2001, the Imperial Japan faces difficulties in the development of a next-generation main Tactical Surface Fighters (TSF) as it defends the front lines of the Far East. The UN has proposed a joint development program between the Imperial Japan and the United States as a part of its international mutual development project of TSF, the Prominence Project. Yui Takamura, a surface pilot of the Imperial Royal Guards of Japan, is given responsibility for the project and sets off to Alaska. Meanwhile, Yuya Bridges, also a surface pilot of the US Army, was heading to the same destination. Yet they never knew that their encounter would change their destiny drastically. This story with exciting human dramas and robot actions takes place in the development of a new Tactical Surface Fighters, the most important and effective weapons against BETA, at a crisis of human extinction.

Based on the visual novel by Overdrive. The what-if story reunites the Second Literature Club Band members Kirari, Chie, Shikanosuke, and Sarina, several months after the concert in the d2b vs Deardrops ~Cross the Future~ fan disk.

Heir of an old famous family of exorcist, Keika You is stricken by poverty after losing his parents. He struggles as a street fortune teller and computer recovery part timer to earn money. One night in a junkyard, he meets the mysterious yet charismatic exorcist, Ki Tanmoku, fighting an evil spirit. This encounter is the beginning of a fated story for Keika You. Unfortunately for him, he was actually hit by a car and became a ghost. That was when the handsome exorcist Ki appeared and asked Keika to make a "pact" with him to fight evil spirits together. Here starts the friendship of our heroes!

After destroying Earth many years ago, the alien race Gauna has been pursuing the remnants of humanity—which, having narrowly escaped, fled across the galaxy in a number of giant seed ships. In the year 3394, Nagate Tanikaze surfaces from his lifelong seclusion deep beneath the seed ship Sidonia in search of food on the upper levels, only to find himself dragged into events unfolding without his knowledge. When the Gauna begin their assault on Sidonia, it's up to Tanikaze—with the help of his fellow soldiers and friends Shizuka Hoshijiro, Izana Shinatose, and Yuhata Midorikawa—to defend humanity's last hope for survival, and defeat their alien foes. Sidonia no Kishi follows Tanikaze as he discovers the world that has been above him his entire life, and becomes the hero Sidonia needs. [Written by MAL Rewrite]