Perhaps the cartoon boy has special tools or assistance that helps him lift the boxes. Maybe there's a pulley system or some magical power at play.
The cartoon boy might carefully place the cans one by one into the boxes, making sure they fit neatly.
It could be that the comic man has superpowers that give him the strength to lift her. Or perhaps there's some kind of mechanical assistance involved.
In some fanfictions, it could be because Peter has a pure heart. Just like in the MCU, only those worthy can lift Mjolnir. Peter might have proven his selflessness and heroism in a particular situation, which made him worthy enough to lift Thor's hammer.
The boy probably uses his climbing skills and determination. Maybe he finds good footholds and holds on tightly.
There could be many stories about a girl lifting a boy. Maybe in a school sports event, a strong girl managed to lift a boy during a partner - lifting competition. She trained hard for it and showed great strength and determination.
Well, the 'lift boy story' might be centered around a young boy's life in relation to the lift. Maybe it's about how he got the job as a lift boy in the first place. Was it out of necessity to support his family? Or maybe it was just a chance opportunity. And then there could be all sorts of things that happen to him during his work hours. He might meet interesting characters from different floors, like a grumpy old man who always complains about the lift speed, or a friendly lady who gives him a tip every now and then. There could also be some sort of mystery or drama associated with the lift itself, like it breaks down and he has to figure out how to fix it or call for help in a difficult situation.
I'm not sure specifically what the 'the lift boy story' is about as there could be many stories with this name. It might be a story about a boy who works in a lift, perhaps his experiences, the people he meets while operating the lift, or some sort of adventure or life lesson that occurs in the context of the lift he is in charge of.
Since I don't know the details of the 'lift boy story', the main character is probably the lift boy himself. There might also be other characters like the people who use the lift regularly, such as the building residents or office workers.
Given that it's called 'the lift boy story', the lift boy is bound to be one of the main characters. There may be his family members who are mentioned in the story, like his parents who rely on his income from the lift - boy job. Additionally, there could be some antagonists in the story, like a bully who tries to pick on the lift boy in the building or a rival for a promotion within the building's staff. These characters would all contribute to the plot and development of the story.
Maybe he found a hidden passage or used his smart tricks to get away.