It's was a nice and amazing story but i just don't understand it...i know yuju is dead so ...

It's was a nice and amazing story but i just don't understand it...i know yuju is dead so hoe about young do and guji??the short hair blonde women??the step parents??why yuju being kidnapped??who is the kidnap??gosh i have so many question but yea gotta admit that this story is amazing just i don't have enough brain cell to understand it