The older sister of the next house has been kind to me since I was little, and she has stayed with me and consulted with me about anything. I had a girlfriend too! When I reported it to my sister, she seemed happy ... "I have to do it properly so as not to disappoint her," and her sister even gives her advice on sex! And it's not just advice, is it? Practice here? I move as my sister tells me. But is this more serious SEX than practice?