It reads 'nekko neko ni saremashita'. This is, obviously, a play on Hatsune Miku's 'mikku miku ni shite ageru', but I don't know how that ever got translated into english. Maybe something like 'addicted/overwhelmed by cats'?
Either that or she's going from her NEET phase to her crazy cat lady phase.
She became 'Kitty kitty' addicted...
A pun on the popular Hatsune Miku song, 'Miku Miku Siteageru', where 'miku' is changed to 'neko', a cat. Eirin, Eirin...I found all these cats. Can I keep them? Can I?