Comments of chapter undefined of The Legendary F Rank

Can I enquire how it jumped from light teasing after a serious situation to 3 years later at graduation? It was just getting into the climax of a potentiallyinteresting plot of a meeting between two cultivators and a backstory to how he resolved everything gaining back his normal school life. I haven't finished the chapter before making this comment so I'm not too sure what's the ending is but, I feel this is rather abrupt and there seems to be 10s of chapters prior I've missed or something. If this is how the novel is, I'll accept it. But if possible could you add in filler chapters into volume 1 if you have time.