A cell can be compared to a school as follows. The cytoplasm is like the general school environment. All the other organelles (like students and teachers) exist within it. The ribosomes are the study desks where the important work of protein synthesis (like students studying) occurs. The endoplasmic reticulum is like the school's internal communication system that transports important things around, similar to how it transports proteins in a cell.
Well, Miracle on Cell No. 7 is not based on real events. It's a made-up tale that aims to touch people's hearts and evoke emotions through its imaginative plot and characters.
A cell phone novel is a type of fiction that's specifically written and read on mobile phones. They're usually short and easy to consume in short bursts.