Masou Gakuen H × H

Hybrid × Heart Magias Academy Ataraxia, or more well-known via its original name: Masou Gakuen H × H (魔装学園 H × H Masō Gakuen Haiburiddo Hāto) is a series of Japanese light novels written by Masamune Kuji and illustrated by Hisasi. Riku Ayakawa is drawing a manga adaptation in Kadokawa's Comp Ace magazine. An anime television series aired on 5 July 2016 to 20 September 2016.

Plot
The plot of the story occurs in the future when Earth is attacked by invaders from another universe through portals, and using weaponry that combines magic and science. Mankind's weapons are practically useless against the invaders. Mankind is forced to retreat from land and develops giant floating structures referred to as Mega Floats. A weapon referred to as Heart Hybrid Gear or HHG is developed, which is the only effective weapon against the invaders. A core is implanted within a person and by calling out the HHG's name, one can summon an armor around them which can effectively combat the Alternate Universe (AU) forces. Hida Kizuna possesses a HHG, but it is not strong enough to make him particularly important. His older sister calls him to transfer to a strategic defense school, where many of the students (many of whom are large-breasted girls) use their HHG abilities to fight invaders from another world while wearing extremely skimpy pilot outfits. Kizuna's fighting ability doesn't measure up, but his sister has another plan — performing erotic activities with Kizuna will allow the girls to replenish their energy or power-up. His ability proves to be critical to their success, as he and the other members of the Ataraxia defense academy find themselves engaged in a hidden agenda about the destruction of two worlds as well as to bring back his beloved from sorrow.

Why It Deserves to get Attacked by Invaders

 * 1) As the original light novel and manga using sexual content as selling point without story developments whatsoever, it was basically an erotica anime which contains full of sexual explicit Ecchi scenes. (Even similar erotica anime like Highschool DXD and Yosuga no Sora focus on story and development rather than sexual content)
 * 2) Contains tons of various unneeded sexual scenes, ranging from breast feeding, masturbation, BSM, into sex scenes.
 * 3) Similar to The Testament of Sister New Devil, Hundred and Arifureta: From Commonplace to World's Strongest, It blatantly rips off Infinite Stratos, Considering how similar the concept of a girl wearing flying mech is, the fact that the main protagonist is the center of attention of girls, or even the fact that the main protagonist has a sister who is also teacher who also has the same personality and similar appearance.
 * 4) All girls in this anime are treated like living sex toys. For example, when a school announce a new female student, they will shoot NAKED holograms of their bodies in front of everyone!
 * 5) Who thinks that using sexual activities to boost fighting performance of characters is a good plot to be adapted in free TV anime?
 * 6) The main character has little to no personality, even when he had to engage into various sexual activities. He didn't feel uncomfortable at all.
 * 7) Various female characters are lustful and only want to engage in sexual activity with the protagonist as much as possible.
 * 8) Generic and forgettable soundtrack.
 * 9) The main purpose of this anime is to boost sales of various goodies from original light novels (erotic dakimakura for example).

Redeeming Qualities

 * 1) At least the character designs of the girls look good.
 * 2) Some of the characters, mainly Silvia, are likeable.