Kemonokko Tsuushin: The Animation - Nekomusume Nia

けものっ娘通信〜The Animation〜 猫娘ニア

Synopsis

Nia, a cat demi-human, is summoned from another world by the main character Negishi. She is puzzled by the sudden change, but gradually becomes accustomed to this world. They decide to play a game to see who can cum first... (Source: Fanza, translated)