"Lowkyuu!!" (● ̄(エ) ̄●)
I dunno,wbu?(〜 ̄△ ̄)〜
In chapter 4, when they are standing outside the building with the glass, there's a picture of a blond Hinata (y'know, from Haikyuu!!) with the word "Lowkyu!" over its head.
"Lowkyuu!!" (● ̄(エ) ̄●)