Kaixin Chaoren Lianmeng: Chao Shikong Baowei Zhan

After Doctor Zhai's father disappears, the young Zhai grows up with the blueprint of a time machine he could never make work as intended. Years later, Happy Superman accidentally activates the completed machine and is thrown into the past, where he meets Doctor Zhai as a lonely child.

The machine can travel backward but cannot simply carry the heroes home, so Happy Superman and his friends remain in the past while searching for a solution. They become the young Zhai's makeshift older siblings, trying to help him open up and care for himself, all while Da Da Guai and Xiao Xiao Guai exploit the same era to cause trouble. Protecting the timeline soon becomes inseparable from protecting the child who will one day become their closest ally.