MOOR-006 The Kansai-speaking Younger Sister Who Came To Stay With Me On Holiday Had Grown Into A Super Masochist (and Had Big Breasts), So I Trained Her To Have Sex Without Telling Her Parents For 1 Night And 2 Days. Nonoka Yukari.

My younger sister Nonoka, a second year university student, came to Tokyo on her day off.
Without telling her parents, we are planning to stay at the house of her older brother (a working adult, without a girlfriend, and 4 years older than him) who lives alone.
Nono had no intention of going to popular spots in Tokyo from the beginning, and she met her brother, whom she loves, for the first time in a long time, and she went to a full-fledged trip that they had always gone together. I came because I wanted to play training and get bored.