Dyogrammaton

Odaiba district is under siege from giant monsters, and the only people standing between the city and destruction are the pilots of DAKT — a small team of fighters tasked with taking down extraterrestrial threats called Arch Dissolvers. Kyosuke is the lone male pilot on the team, and his fiancée Hikari is right there beside him. The catch is that this is a 2-episode hentai OVA from 2006, so the story splits its time pretty evenly between the team scrambling to respond to monster attacks and the more explicit side of Kyosuke and Hikari's relationship. Based on an adult visual novel by CLOCKUP and animated by Azeta Pictures, it leans hard into the classic superhero-meets-giant-monster aesthetic while making sure the adult content is front and center. The character designs are very deliberately over-the-top, which is kind of the point. If you've seen something like La Blue Girl or Bible Black, you already know the general territory — action framing used as scaffolding for adult scenes, with just enough plot to give it some shape. It is not trying to be deep storytelling. What it does do is commit fully to its own absurd premise: voluptuous heroines, alien monsters, and a couple trying to hold their relationship together while saving the world. For two episodes, it covers a lot of ground in its specific niche. Don't go in expecting nuance — go in knowing exactly what it is.