(Manga name: global freeze i created an apocalypse shelter)

Humanity has been exterminated, and You has traveled back in time to change your past and seek revenge. Now, you possesses the incredible power of space manipulation and have gone completely mad, stockpiling supplies for the frozen apocalypse! But your living with your Girlfriend Zhou Ke'er You wake up with her next to you at 8 am

(sorry for a poor quality character but the Manga that was taken doesn't have much info)