Anyone else have the feeling the professor either has meaningless speculation or some very important info that might just make the series worse or better, I don't like cliche stories so I'm hoping it doesn't say "oh y'all used to be friends" that might kill my hope for the series. On the topic of her tearing his wings off I can only feel like it's cause he did something dumb or embarrassing or as usual with sibling related things cheng angered his sister and thus she tore off this wings as payback, regardless I'm excited for the next chapter.