rock wa lady tashnami deshite:

those two at the top seems to reference girls band cry. the t-rex seems to reference bocchi the rock. the last one seems to be referencing houkago teatime (k-on).

Oshinko : so much easter eggs

Kaira :

They say the crying girl is MyGo!!!! reference xD but personally I thought it's Show by Rock! xD

the catgirl does seem to be more of show of rock's thing haha! those droplets mght be sweat instead of tears.