I think what happens is that Kuzunoha said she doesn't feel like the world is real for her, and then becomes desperate to try all sort of things to "feel more", like all the record breaking at school, risky bets, promiscuous behaviour, and seeking excitement wherever.
This is kind of implied on chapter 63 and 64.
And since she isn't from this world gets attracted to oddities.
Plus what was expressed on this chapter.
This is kind of implied on chapter 63 and 64.
And since she isn't from this world gets attracted to oddities.
Plus what was expressed on this chapter.