The story
From Japanese 獣(けもの)耳(みみ) (kemonomimi), from 獣(けもの) (kemono, “animal”) + 耳(みみ) (mimi, “ear”).
Etymology from Wiktionary, CC BY-SA 4.0.
kemonomimi
Today it means: A humanoid fictional character who has animal ears and/or tail(s). Full definition →