Bathtub Bonding: Enforced by Kizuna in an attempt to get Yurishia and Scarlet to admit how they really feel about each other and hopefully fix their broken friendship.For example, you can have not one but three different Cool Ship with the most badass characters from each faction as their crew. Badass Army: Making friends with your former enemies rather than killing then has its advantages.Before the alternate worlds close permanently, Kizuna had sex with Zeyclone and Grabel, and from that point on he would have to frequently perform Ecstasy Hybrid with the rest of his harem for the sake of their missions. However, there is still a small possibility of fecundation being successful, at which point the embryo would expel the core out of their bodies.
The cores inside the bodies of the girls lower the chances of them being impregnated to near zero. Babies Ever After: Discussed at the end of the last volume.After all, that is the reason they are even in Ataraxia in first place. As You Know: Episode 2 begins with Reiri explaining all about the current state of the world to the students of Ataraxia, who unlike the audience have no reason to not know about it.According to her, this volume is a Breather Episode because somebody was complaining that Hybrid x Heart Magias Academy Ataraxia isn't really a story about an academy. Lampshaded by Nayuta in her Breaking the Fourth Wall moment in the prologue of volume 11. It comes back in volume 8 only to lose all significance to the plot again halfway through the volume. Artifact Title: The Ataraxia Academy mentioned in the title disappears from the story after volume 4.Almost Kiss: Kizuna and Aine are about to kiss at the end of volume 7 only to be interrupted by the appearance of the new Big Bad Ensemble.All Your Powers Combined: The end result of Eros' Power Copying ability, which he uses to completely overwhelm his opponents, and the anime fully realizes this when he uses the powers of all four female members of Amaterasu together against Zelshione and her forces.
After the empire is defeated and befriended, they form a new alliance with it and Baldein, this time to defeat the Deus Ex Machina.