Gigant 3.

BOY MEETS GIRL MEETS THE END OF THE WORLD

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!