A failed former boxer, a young tech-building prodigy, and a huge brute are chosen by a mysterious cosmic entity and given the power to transform into Giant warriors known as the Ultramega to fight an indiscriminate universal viral plague that turns infected people into massive, violent Kaiju monsters.
For years, the Ultramega fight epic Kaiju battles with all the infected they come across until the techie loses an arm to the cause, stops fighting Kaiju, and starts building robots to do so instead. The brute gets overwhelmed by the work and goes into hiding, and the Boxer's pregnant wife gets infected with the virus, which causes him to abandon her, as proximity to the Ultramega triggers transformation in the infected and vice-versa.
10 years later, now remarried and with a baby named Noah, the boxer remains the only one continuing to fight, but when his resentful virus-riddled first wife sends their fully developed monster Kaiju baby into the city after him, the team gets back together to try and stop it, but they are all brutally defeated and easily killed, leaving the city decimated and the boxer’s second wife dead. Survivors develop a way to detect the infected long before transformation, segregate them, and build a wall around the uninfected.
There are no more Kaiju attacks for about 15 years, and almost all Kaiju are stuck in a smaller weaker state due to the Ultramega absence. Now a spirited young boy living on the outside of the wall, where the relatively far-smaller Kaiju and their loyal human cult, fight against regular surviving humans over dwindling resources, Noah continues to believe in Ultramega and fights against the Kaiju cult, which gets him caught by the Kaiju’s and sent to an arena where they make people fight Kaiju monsters for entertainment. Noah manages to kill one of the monsters, which gets him noticed by the Ultramega cosmic entity.
He fuses with the entity and turns into UltraMega, whose presence triggers the massive growth of all Kaiju around him. Noah fights and kills them until his Kaiju half-brother (now the Kaiju king) shows up, and Noah manages to kill him too, avenging his father. He returns to human form and rests until his dad’s severed massive Kaiju head falls out of the sky, and is somehow still able to talk. The art here is some of the best I’ve seen in recent comics. I just fucking love it. The first chapter was the best of the bunch, but things quickly went downhill story-wise after that, as the rest of the issues were stingy with interesting story/world building details. So much gore and death, so much violence, I loved it.