First, no matter whether you are an ugly and old guy or a gentle man, you can project yourself into a beautiful young boy (Shota). In other words, you will become a perfect Shota while you watch a hentai material.
Second, your desire to be like a child should be fulfilled. Shota who has no sexual knowledge is kindly welcomed by an elder sister, and you will be getting spoiled by her. She must be kind and helpful.