2016/8/18 22:10

ORANGE RANGEの あの曲です(˘ω˘)🍣。

2016/8/18 22:10

That ORANGE RANGE song (˘ω˘)🍣.

The ORANGE RANGE song is SUSHI Tabetai. The two characters beside Kumiko first appear in the "music video":http://www.nicovideo.jp/watch/sm27501450 at 1m29s. The style in which Kumiko's body is drawn is perhaps supposed to mimic other parts of the music video. For example, the figures at 1m21s and 1m38s.