Prequel to .

A mini movie released on the Fire Emblem Heroes website in honor of a major plot twist in Book 3.

The surrealist world of [i]Tenshi no Tamago[i] is desolate and devoid of the bustle of traditional everyday life. Instead, the world is filled with ominous phenomena, including floating orbs populated with statues of goddesses, gargantuan army tanks that seem to move unmanned, armies of fishermen who chase after the shadows of nonexistent fish, and caverns solely decorated with glass vessels of water. In this run-down world, a young girl takes care of a large egg and scavenges for food and drink. She encounters a mysterious man with a cross over his shoulder, who soon becomes curious about who she is and what her egg contains. They decide to explore the lost and broken landscape together, questioning each other about the nature of faith, the purpose of the world, and the origins of their lives.

The majority of the Matsuno household is comprised of six identical siblings: self-centered leader Osomatsu, manly Karamatsu, voice of reason Choromatsu, cynical Ichimatsu, hyperactive Juushimatsu, and lovable Todomatsu. Despite each one of them being over the age of 20, they are incredibly lazy and have absolutely no motivation to get a job, choosing to live as NEETs instead. In the rare occurrence that they try to look for employment and are somehow able to land an interview, their unique personalities generally lead to their swift rejection. From trying to pick up girlfriends to finding the perfect job, the daily activities of the Matsuno brothers are never dull as they go on all sorts of crazy, and often downright bizarre, adventures. Though they desperately search for a way to improve their social standing, it won't be possible if they can't survive the various challenges that come with being sextuplets!