Ah! an Electronic Girlfriend Uses a Mecha to Kill People in the Apocalypse?

[Single heroine] + [Misty Apocalypse] + [Mecha] + [Electronic Girlfriend Development] My name is Yan An. At a young age, he inherited Xingyu Group, a dark horse company in the mecha manufacturing industry. However, everything God has given has already been marked with a price. Ever since that incident. Xingyu Group gradually declined, leaving only a mecha manufacturing factory on the verge of bankruptcy... Recently, I have become addicted to a system for developing electronic girlfriends. Through this system I can gift items to my electronic girlfriend. I always thought this was a highly simulated game. Until one day, the system prompted me to receive an F-level customized reward... —————————— My name is Xu Muchuan. When I woke up, the outside world was shrouded in a mysterious space fog. The screams of monsters and the screams of humans are endless. A few roommates and I huddled in the small dormitory. Until one day. Army gunfire rang out. Then my roommate disappeared... With a severe fever, I could only curl up on the bed in the dormitory. Quietly waiting for death...