Anime Crossover: Many Children, Many Blessings; Yukino, the Wife from the Apocalypse

Chang Wei transmigrates to a crossover anime world, only to find it overrun by zombies.
Doomsday Catastrophe Arrives
Global freezing, global drought, global red fog...
The entire nation of Sakura called on its people to stay home, stockpile food, and remain indoors.
Just as Chang Wei was wondering what to do, the "Many Children, Many Blessings" system was activated! As long as pregnancy and childbirth are successful, rewards will be given!
Chang Wei held the special spray in his hand, gazing at the gate beneath the snow next door.
A bold idea came to mind.
[Yukino Yukinoshita: You wicked scumbag, you've imprisoned me for a week and you're not going to tell me who you are?]
[Yukinoshita: Chang Wei, you still dare to say you don't know martial arts?]
[Kato Megumi: Have you subconsciously forgotten that I'm being imprisoned?]
[Kasumigaoka Utaha: You scumbag, what color do you want to see today?!]
PS: New book launch, please give me flowers and reviews! Apocalyptic setting, not a saintly one, decisive in killing, light on darkness.