LightNovel/MahouSensou (魔法戦争 / ''Magical Warfare'') is a LightNovel series by author Hisashi Suzuki with characters designed by Lunalia.

The story revolves around Takeshi Nanase, who - his rather dysfunctional family aside - is an OrdinaryHighSchoolStudent. His life changes completely when a girl named Mui Aiba collapsed on his school ground. She turns out to be a magician from another world and she is involved in a conflict against a group known as Ghost Trailer.

A one-cour anime adaptation by {{Creator/Madhouse}} aired during [[Winter2014Anime winter of 2014]].

!!''LightNovel/MahouSensou'' provides examples of these tropes:

* AcademyOfAdventure: Subaru Magical Academy. As you might have expected, our hero, his girlfriend and other friend transfer there.
* AccidentalKiss: Mui and Takeshi received their first kiss from each other in this fashion. Kurumi is not pleased when she finds out.
* BecomingTheMask: Isoshima's relationship with Takeshi started as just an act to drive off stalkers but by the series' beginning she's in love with him for real.
* BreastExpansion: How Isoshima discovers that she is a magician; her first transformation was here.
* CombatClairvoyance: Takeshi's power is "Evasive Magic".
* EasyComeEasyGo: The only thing necessary to obtain magic for an adolescent is to come in direct contact with magic. The only thing necessary to lose magic is to use it directly aganist another magic user in the real world. Although it was heavily implied that should a magic-using adult lose their magic, it will be LostForever.
* GainaxEnding: The anime ends with [[spoiler: Takeshi and Gekkou getting caught in a massive magic explosion, and Takeshi apparently waking up at Subaru ''in 1998'']]. Combined with a number of other mostly-incomprehensible plot twists, and a lack of resolution for the series' existing plot threads, it makes for a very confusing and unsatisfying ending.
* ImprovisedWeapon: The only weapon Takeshi can find to fend off the attacking Ghost Trailer members is a {{broom|stickQuarterstaff}}. Averted in the anime as he has a ''shinai'' with him at that time.
* LoveTriangle: Both Kurumi and Mui have feelings for Takeshi. The pretend relationship between Kurumi and Takeshi adds a wrinkle.
* MeetCute: Takeshi and Mui's first meeting is him finding her passed out on school grounds.
* PlayingWithFire: Ida's power.
* SkewedPriorities: In the first episode, Isoshima was more concerned with her pretend boyfriend calling a girl she didn't know by her first name than the muscle-bound lunatic with the massive sword attacking them.
* TalkingIsAFreeAction: Mui gives a big info dump in the first episode while she's sitting down talking with Takeshi. The problem, they were being chased and the chasers don't catch up until she's finished.
* ThemeNaming: The major characters have kanji {{numer|icalThemeNaming}}als in their names:
** Nanase (七瀬) has 七 (seven).
** Mui is written as 六 (six).
** Isoshima (五十島) has 五 (five) and 十 (ten) (when put together as 五十, it's "fifty").
** Kazumi (一三) has 一 (one) and 三 (three).
** Tsuganashi is written as 十 (ten).
** Shijou (四条) has 四 (four).
* TouchedByVorlons: This is how all magicians gain magic; they came into contact with magic from another magician. Takeshi, Isoshima, Ida, Futaba and Gecko all get magical powers after being attacked or accidentally attacked by magicians.
* WhatHappenedToTheMouse: Among other questions the anime leaves unanswered: what happened to Ida's sister, who was [[spoiler: taken by Wizard Brace's secret service]]?
* WholePlotReference:
** A BigBad who leads a faction full of magic-wielding supremacists with the goal of conquering [[{{Muggles}} non-magical people]], then suddenly disappears for more than ten years, awaiting his revival? Sounds a lot like [[Franchise/HarryPotter Lord Voldemort]].
** A subset of humanity with fantastic powers fearing persecution. One faction wants to live peacefully with norms, the other wishes to dominate them. [[ComicBook/XMen Where have we heard this before?]]