The contents of the communications were mainly about the day-to-day happenings such as, not forgetting the relatives and the life situation of both parents' families, about the road traffic in time of Kyoko’s driving with Saori or their acquaintance’s traffic accident and its damage and injury etc….
That information was proven to be right with the actual driving or visiting with their acquaintances afterward in fact.
Saori was getting much more chatty and friendly with Isshiki.
Those episodes were believable for Kyoko and made her sure that he was just right <Isshiki>. Anyway, Kyoko had gained knowledge of his episodes from her other seniors in university days. As for his formal meetings with a view to marriage, it led her decide to separate from him.