Artist's commentary
It's Saten-san, with bigger breasts and elf ears
2015/8/1 12:06 SAI
8/1 is boob day. Therefore, here's Saten-san, with bigger breasts and elf ears!
そしてカグラ消しじゃ(`・ω・´)bそんな名称があるのか知らんけど(´ヾ(:3ノシヾ)ノシ
With Japanese number play, 8 can be "pa" and 1 can be "i". So 8/1 is "pai" day or boob day.