This is about a group of straight burly, macho guys from a defunct military unit that survived a cosmic event and acquired bodies that essentially turn them into terminators. The catch however is their bodies have layers of damage thresholds that lead to them stripping their now strangely metallic clothes piece by piece instead of being wounded. When they seem to strip down nude in battle though they undergo a transformation by casting off their bodies as shells and reveal that smaller female bodies serving as skeletons for their regular bodies. 

The more layers they shed off, the more defensive power gets traded in for strength and speed so these female bodies are their peak battle forms and these forms are copies of the first female they take in copious amounts of fluids from, through sex in most cases. It's not just the form either as they also acquire the memories and mental imprints of the person from that moment. This results in these female forms of theirs having a mix of the guy and girl's personality which leads to drastic behavioral shifts until they put back on their original bodies.

The story follows a trio from that unit, one of whom is forcibly recruited by his old partner and their former second in command to take down the rest of their unit when they cause trouble in the world. The protagonist became a shut-in soon after the incident so he hadn't been made aware of this quirk his body now has and is mocked as being the "virgin" of their group since he would have known if he got laid since then. 

A young woman from the secret world police joins them on their misadventures to take down and contain their troublemaking ex-comrades as their handler and official team leader as well. Together they have to stop international crises by fighting ever increasingly absurd battles as they track down the mastermind behind the chaos - the professor their unit was ordered to protect and the man that made them what they are.