Akebi Komichi lives out in the countryside with her family. She's won entrance to the prestigious Roubai Academy middle school for girls and now she wants only two things—to wear the school's sailor uniform and to make a hundred friends!

Traumatized by a childhood incident with a friend who took exception to his love of traditional dolls, doll-artisan hopeful Wakana Gojou passes his days as a loner, finding solace in the home ec room at his high school. To Wakana, people like beautiful Marin Kitagawa, a trendy girl who's always surrounded by a throng of friends, is practically an alien from another world. But when cheerful Marin—never one to be shy—spots Wakana sewing away one day after school, she barges in with the aim of roping her quiet classmate into her secret hobby: cosplay! Will Wakana's wounded heart be able to handle the invasion from this sexy alien?!

In a world of magic, the powers and future of a mage are predetermined at birth through so-called "Marks"—four symbols that categorize a human's aptitude for magic. Lamenting the fact that his mark was considered ill-suited for combat and only useful for magic augmentation, an incredibly skilled sage decided to reincarnate thousands years in the future. Reborn as Mathias Hildesheimr—a six-year-old boy and the third son of a duke's family—he attains the mark of close combat he always desired. Unfortunately, it is also discovered that mankind's knowledge of magic and swordsmanship has drastically deteriorated in this era; only shoddy magic equipment can be sporadically found, while even the most basic spells have been forgotten. To add insult to injury, his current mark, once hailed as the most powerful, is now viewed as the worst. When Mathias becomes 12 years old, his unrivaled swordsmanship lands him in the Second Royal Academy. Shattering prejudices, he promptly makes ripples in the academy and beyond. However, the former sage uncovers signs of dark forces working in the shadows, and with humanity weaker than ever, it is up to Mathias to thwart their evil plans. [Written by MAL Rewrite]

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.