Furupani!

A sergeant by the name of Sousuke Sagara is assigned an important task. That of guarding high school girl Chidori Kaname. Sousuke is a military genius, gaining high rank at an early age, but because of his strange upbringing, he lacks social skill. Now, he finds himself as a fish out of water as he attempts to protect a girl from an evil organization and turn in his school work on time. (Source: Anime News Network)

The Angel Troupe consist of five members, the beautiful Milfeulle, Mint, Ranpha, Forte, and Vanilla. They have one mission, to protect Prince Shiva at all costs. Prince Shiva is the sole survivor of the royal family destroyed by a coup d'etat. They must complete the mission under the command of Takuto Meyers. (Source: Anime News Network)

Kusanagi Kei, a high-school student living with his aunt and uncle, has an encounter with a female alien. This alien is revealed to be a new teacher at his school. Later, he is forced to marry this alien to preserve her secrets. From there, various romantically-inclined problems crop up repeatedly. (Source: Anime News Network) *Note: \-The title was never "- sensei," the Japanese characters phonetically spell "teacher". \-The chapter count includes one extra chapter.*

The Stellvia Space Academy is one of several Space Foundations dedicated to saving Earth from a wave of supernova explosions that is scheduled to hit the planet in 70 days. Shina Katose is a newly-enrolled student at Stellvia with exceptional skills as a programmer but lacklustre talent as a pilot. Her dream is to be chosen as one of the elite pilots needed to help save the earth, and Stellvia is her story. (Source: Amazon)