I love all these plays on Uzaki's shirt recently. Osanai's is pretty great.

Oh, I should probably actually expand on this actually. Osanai's shirt is a play on the one worn by uzaki_hana, from uzaki-chan_wa_asobitai!. The original character's says SUGOI DEKAI (super huge), in reference to her chest. Osanai's here is KANARI CHIISAI (pretty small) in reference to the same thing.