From Tokyopop:
Naota's life isn't simple: he lives with his eccentric father and grandfather in a two-story house above a family-owned bakery in a town marked by a gigantic factory at its heart. The factory looks suspiciously like a hand iron, replete with a steam release at the top--not the most typical landmark. Life is already strange enough, but to top it off, his older brother's ex-girlfriend starts making extremely suggestive passes at him...and an impish, playful alien smacks him in the head with a bass guitar and then infuses herself into his family.

The story centers around two fiercely fighting schoolgirls, Ryuuko Matoi and Satsuki Kiryuuin. On a campus ruled by force, a transfer student wielding a Basami sword brings about upheaval.

(Source: ANN)

In their closed-off underground village, Kamina and Simon chafe at the limits imposed by the village elder. Yet all this will change, when Simon stumbles across a fantastic device - just as the village's peace is broken by a violent intrusion.

Adapted From Neon Genesis Evangelion.
A short story in the lives of the young Evangelion pilots. One hot day, Shinji gets into a fight with his apartment-mate Asuka, due to her revealing clothing. Will Shinji be able to figure out how to patch things up with her?

From AnimeCouncil2 :

Gurren Lagann... School version, more ecchi and stuff, that's about it :D

Adaptation of Top Wo Narae 2!/GunBuster 2

Takemoto Takeru, an ordinary high school student, encounters a strange light during a bike delivery for his part time job.
When he stops and searches the surroundings, he notices a cute girl named Hikari climbing out of a sparkling cocoon in the forest.
Takeru instantly falls for her at first sight, but was interrupted when suddenly a monster appears at the same spot and attacks the girl.
This is the beginning of adventurous and exciting days for Takeru, the mysterious girls, Hikari and Akari, his childhood friend Nishino, Mari, and his classmates.

The Upper Region sends two angels "Panty" and "Stocking" to Earth. Panty, a blond woman in teen-celebrity-style clothes, and Stocking, a black haired woman in gothic lolita fashion, fight against peculiar ghosts.

In the year 2015, the Angels, huge, tremendously powerful, alien war machines, appear in Tokyo for the second time. The only hope for Mankind's survival lies in the Evangelion, a humanoid fighting machine developed by NERV, a special United Nations agency. Capable of withstanding anything the Angels can dish out, the Evangelion's one drawback lies in the limited number of people able to pilot them. Only a handful of teenagers, all born fourteen years ago, nine months after the Angels first appeared, are able to interface with the Evangelion. One such teenager is Shinji Ikari, whose father heads the NERV team that developed and maintains the Evangelion. Thrust into a maelstrom of battle and events that he does not understand, Shinji is forced to plumb the depths of his own inner resources for the courage and strength to not only fight, but to survive, or risk losing everything.

(Source: AniDB)