The two's bond began during the events of the first case. Kyoko is the one who tells Makoto that there was more to Sayaka's murder than what everyone had been led to believe. It is thanks to her words that he was able to solve the mystery of his late friend's death. She later comforts him about the events, saying that Sayaka was hesitating to carry out her planned deed to kill him and gave her (and subsequently him) the piece of evidence needed to solve the case.