A Happy Mother's Day for Yasuko (Pixiv Fanbox)

Satsuki and Mei give their mom a well-deserved Mother's Day licking. Sorry I'm not doing an Early Bird on this one, guys, I wanted it to be posted in time for Mother's Day. サツキとメイは、母の日にお母さんをなめてあげます。母の日に間に合わせたかったので、アーリーバードにならなくてごめんね。