Legion of Doomsday: Check into a Women's Apartment at the Beginning

(Shuangwen+beautiful army+system+invincible) Zhang Chengfeng, who was ruthlessly betrayed by his girlfriend, was forced to run into the woman's apartment to escape as the apocalypse approached. At the moment of life and death, the most powerful legion system unexpectedly awakened. Originally, it was a very happy thing to have a system, but Zhang Chengfeng was not happy at all, because this system only allowed the recruitment of women as team members... Beautiful royal sister, innocent school beauty, cute lolita, stunning twins, mature beautiful women... (The introduction is too weak, please move to the main text.)