After the third world war, nations devastated by biological warfare no longer have the ability to protect the wastelands, so the defense of these territories is left to private military companies like Griffin & Kryuger, whose android soldiers or "tactical dolls" are tasked with fighting the rogue android army of Sangvis Ferri. Now M4A1, the indecisive but potentially capable leader of the elite "Anti-Rain" team must protect her comrades in a series of operations to try and regain the upper hand against Sangvis Ferri.

The first astronaut in human history was a vampire girl. Following the end of World War II, the world-dividing superpowers, Federal Republic of Zirnitra in the East and United Kingdom of Arnack in the West, turned their territorial ambitions toward space. Both countries have been competing fiercely for development. East history 1960. Gergiev, the chief leader of the Republic, announces the manned space flight program Project Mechtat (Dream), which, if successful, would be the first feat for humankind. At that time, Lev Leps, a substitute astronaut candidate, is ordered to perform a top secret mission. The "Nosferatu Project"—a program that experiments with vampires prior to manned missions—will use Irina Luminesk as a test subject, and Lev is to monitor and train her. Even while trifled by the walls of the race and ego of the nations, Lev and Irina share a genuine sentiment as they aim for the universe. (Source: MAL News)

Agedama is a small boy going to elementary school and having the usual problems for a boy of his age. He is also secretly a superhero-in-training (called "Agedaman"). Along with Wapuro, his floating computer companion, he fights against a criminal organization who can turn humans into monsters of various types.

This is a special to To Heart: Remember My Memories, which includes fighting scenes between all the female characters.