AGRAVITY BOYS (Series) favorite_border

Volume 1: With Earth destroyed, four survivors — Saga, Geralt, Baba, and Chris, all male — face the crisis of human extinction! Then, a mysterious life-form suddenly appears and hands them a secret elixir capable of changing one person's gender… What will they do!? As humanity's last hope, they race through a survival adventure in outer space! A brand-new, zero-gravity comedy floats into action!!