Do I Fall in Love in the End of the World?

Product manager Zhao Beihe died suddenly at his workstation after working overtime for 37 consecutive times. When he opened his eyes again, the ceiling was pressing on him and zombies were rampant outside the window. Others awakened in the apocalypse with fire powers and enhanced strength, but a translucent blue panel popped up in front of his eyes, which read: Welcome to Love Simulator v6.6.6 (Beta version). Its functions include: visualization of favorability, dating route planning, and a "love word crit" that can only be used once a day - it can also take effect on zombies, but the effect is more abstract. The system AI, Xiao Ai, is a bitchy lady with a sharp tongue, and her ability to complain is much stronger than her auxiliary functions. On his first day of survival in the abandoned city, he used a broken swivel chair as a weapon and bumped into former special forces lieutenant Shen Qianjun. Starting from two people and an abandoned police station, Zhao Beihe relied on a love system that should not appear in the end of the world to recruit teammates, build strongholds, and kill waves of corpses.