たーまやー

夏コミ新刊。どうぞよろしくお願いします。

とらのあな様「http://www.toranoana.jp/mailorder/article/04/0030/43/87/040030438740.html」

Look, fireworks!
It actually says "Taaamayaaa," which is a traditional Japanese call made when seeing fireworks, after one of the major classic fireworks manufacturers.