GIGANT manga volume 1 features story and art by Hiroya Oku, the author of Gantz.

Rei dreams of becoming a big-ticket film director, but when he stumbles into a chance meeting with a busty adult film star, his high school life takes a turn for the strange. Not only does his favorite porn star like him, she gains the power to grow to an enormous, towering size! Is alien technology to blame? Time travel? The end of the world? All manner of bizarre trouble lies ahead, and a gigantic, gorgeous woman is just the tip of the iceberg!

GIGANT manga volume 2 features story and art by Hiroya Oku, the author of Gantz.

For Rei, the impossible already happened when he met PaPiCo, a gorgeous porn star and the subject of his every fantasy. The fact that she’s wound up with the power to grow to truly gigantic proportions is only the tip of an ever-stranger iceberg. The world sees a new anomaly every day, all of them orchestrated by a mysterious website called “E.T.E.” It offers its users the opportunity to vote on how the world will end, one disaster at a time. Can Rei’s budding, forbidden romance survive this weird apocalypse?

GIGANT manga volume 3 features story and art by Hiroya Oku, they are also the author of the top-selling title Gantz.

A chance encounter wound up giving Rei a chance to become the boyfriend of PaPiCo, his favorite porn star—which was already plenty strange. But against the backdrop of a shady website running polls on how the world should end, PaPiCo wound up with the power to grow to truly gigantic proportions. When an equally giant monster descends on Tokyo, threatening the life of Rei and millions more, she springs into action, ready to defend everything she loves!