The Novel that Yvonee read was called "The Secret Garden". But if you want the real example of this novel, there is a manga called "Goodbye, My Rose Garden" with same story that Yvonne mentioned.
"Powder our Noses", i just searched it and found: (euphemistic, typically of women) To visit a lavatory to use a toilet, reapply makeup, (when used of a group of women) engage in private conversation, etc.
A few chapters ago, food was poured on Yvonne, that thing was not considered as bully. 🤨 But now she has become a bully!! Damn!! Which bully will sit with you and share food with you? 😕