Akane Maniax OVA
Jouji Gouda is a new transfer student at Hakuryo High School. On his first day of class, he fell in love at first sight for Akane Suzumiya and boldly proposed to her on the spot. The two characters conflict with each other greatly, but Jouji never gives up and would do anything to express his love towards Akane. Although his attempts to win Akane's love at first do nothing but anger Akane, he gradually starts to make an impression on her, inspiring Akane to be more honest about her own feelings.
There are two possible endings. In the good ending, Akane admits she might have developed feelings for Jouji—but confesses that she might be using him as a rebound guy since he reminds her of her sister's ex-boyfriend. He then finds a new true love in the form of Muv-Luv's Sumika, only to have his heart broken about a minute later when she goes running after Takeru. In the true ending, Jouji transforms into a hero called Dimension Knight Tekkumen (時空の騎士テックメン, "Jikuu no Kishi Tekkumen") and fights aliens and is not afraid of anything. Either way, he is said to have transferred out of the school after being scouted for a baseball team in Muv-Luv Extra. Kouduki suggests that this might have been Meiya's doing in Muv-Luv Extra, and we see that this is indeed the fact in the Akane Maniax OAV, which suggests that the true ending is actually not the true ending.