Gu Nianzhi's suspicions were certainly warranted.
She analysed the matter with He Zhichu after the event and came to the conclusion that since the accident was not incidental, someone must have leaked the information or even colluded with someone else.
Gu Nianzhi had a history with Gui Suyao, and not a minor one. If for some reason Ishihara Taro had enlisted the help of Gui Suyao, it didn't mean anything difficult. She just had to make a call to him and report Gu Nianzhi's whereabouts to him.
Could her breakthrough lie with Gui Suyao?
Gu Nianzhi returned to the library and forced herself to focus on her books instead. She revised and went through the examination materials once more.
