One day, as Yuusaku and Takeru are on their way to see Kusanagi, Shima appears and calls out to Yuusaku. Takeru continues on alone, and when he meets up with Kusanagi, he asks how Kusanagi and Yuusaku first met.
To know the whole story 
about the Lost Incident,
Die Wahrheit über
den Lost-Vorfall aufzudecken,
Para conocer toda la historia
Para saber melhor do Incidente Lost,