For all that Okkotsu Yuta is, technically, not one of Shiki 's fellow classmates, somehow she ends up seeing quite a lot of the boy over the following days. In a way, this only makes sense; the cursed spirit attached to the boy is one that is Special Grade, so in the case of any

accidents,

of all personnel in the Tokyo school Shiki is the one who definitely needs to be present.

A little less pragmatically, Kinji and Kirara are both getting along well with Okkotsu-san. It 's not uncommon for them to seek out the boy on their own during their free time. Which, in turn, means that when Shiki is with her classmates in the Tokyo school, she also ends up spending time with Okkotsu-san when her classmates decide to check in on the boy.