Lu Ming and Su Qiao were roommates in high school for three years, and their relationship was particularly close. However, this was Lu Ming’s first time going to Su Qiao’s house. Su Qiao didn’t really like having people over at his house, and he had never welcomed anyone before. Today, he invited Lu Ming to his house for the first time because it was raining outside, and both of them got soaked. The news station issued a heavy rain warning, and there would be a typhoon tonight. They couldn’t withstand the wind and rain outside, and even the hundred-year-old trees fell down. The weather was really terrifying, so Su Qiao brought him to his own house and let him stay overnight. When Su Qiao entered the house, he reminded him that there was only one younger sister at home and asked him not to disturb her. Lu Ming had always known that he had a younger sister, a biological sister, but had never met her. Today was the first time. As soon as they entered the house, they saw a chubby figure coming towards them. The figure walked up to Su Qiao and squatted down to hand him a pair of slippers. Su Qiao naturally put them on. When the little girl lifted her head, Lu Ming took a glance and was attracted by her chubby face. The little girl was quite good-looking, with a round face, particularly fair skin, and clean and clear eyes. She was really pretty. Just a little chubby, a bit overweight. Lu Ming took a glance and really thought the little girl was cute. He jokingly said to Su Qiao, “Su Qiao, you’re really something. You have such a good-looking sister, and you didn’t introduce her to us. Are you afraid we’ll hit on your sister?” When Su Qiao heard this, he glared at him unhappily, “Don’t talk nonsense.” Lu Ming didn’t know why he was unhappy. Seeing that the little girl was good-looking, he reached out to greet her proactively, “Hello, little sister. I’m your brother’s good friend, Lu Ming.” The little girl heard this but didn’t respond; she pursed her lips and tightly held onto her dress, not saying a word. Su Qiao lightly pushed her and said, “Go back to your room.” Su Qiao noticed that Lu Ming was staring at Su Tian with a certain look in his eyes, so he snapped his fingers to remind him to snap out of it. He explained, “My sister has intellectual disabilities. She had a high fever when she was young and wasn’t taken to the hospital in time, so her intelligence is stuck at the age of eight.” Lu Ming had felt something was off when he saw the girl earlier, but he didn’t understand until he heard this. Wasn’t she a mentally challenged child? An 18-year-old body with the intelligence of an 8-year-old. Although Su Tian had some issues, her family had taken good care of her over the years and never let her go outside. So she could still take care of herself like a normal person, just with the intelligence of an 8-year-old, like a child. She was shy around strangers. Lu Ming had originally wanted to tease the little girl when he first saw her, but after hearing this, he restrained himself. She was born with a disability, and if he still teased her, he would be worse than a beast. So he suppressed all his thoughts. Su Qiao got soaked in the rain, so he went inside to take a shower. He glanced at Lu Ming and asked, “Do you want to shower together?” 1 Lu Ming was disgusted by him and felt like spitting on him. Goosebumps appeared all over his body. “Get lost! I don’t have that kind of fetish. You go shower by yourself.” Su Qiao rolled his eyes at him, not interested, and went inside by himself. He took a shower as slowly as a turtle, and Lu Ming, wearing wet clothes, was uncomfortable. He was afraid of catching a cold, so he took off his clothes. Just then, Su Tian brought him a cup of hot water and handed it to him, saying, “Brother, drink tea.” This little girl lived up to her name. Her name was Su Tian, and her voice was really sweet and milky. He didn’t know if it was because she still liked drinking milk powder, but there was a smell of milk on her. Lu Ming took the hot water from her and smelled that fragrance, feeling his beastly instincts coming out. 2 He told himself to restrain himself. The little girl was not a normal little girl; she was only 8 years old… He took a sip and stared at Su Tian. Su Tian obediently returned to the room and waited for Su Qiao to come out. When he came out, she also came out and handed him a cup of water, saying, “Brother, drink tea.” Lu Ming kept staring at her. In fact, if Su Qiao hadn’t mentioned that this girl had mental problems, you couldn’t tell from her appearance. Su Qiao wiped his hair with a towel and called Lu Ming to take a shower. Seeing him naked, he handed him another set of clothes and warned him, “Be careful, put on your clothes, don’t let my sister see.” 3 Lu Ming, afraid of being beaten, quickly took his clothes and went to take a shower. After Lu Ming finished showering, he washed his clothes and prepared to hang them on the balcony. However, he had never had a girlfriend before and had never seen such things belonging to a girl. So when he saw Su Tian’s underwear hanging on the balcony, he felt a tightness in his throat. It was probably because she was still a child that she was wearing cotton cartoon underwear. The underwear with patterned little clouds looked particularly cute. It was probably because she was a little chubby, so the size was a bit big. 4 Lu Ming felt like he was sick. Otherwise, how could he react looking at a young girl’s underwear? His penis almost stood up. He felt that he was a bit perverted. Before leaving, he even touched the young girl’s underwear. He felt like the words “beast” and “pervert” should be written on his forehead, so he quickly went out. After he went out, Su Tian had already fallen asleep. He and Su Qiao shared a room, with Su Qiao lying on the bed and him sleeping next to it. Although the two had a close relationship, sharing a bed still gave them goosebumps, so they placed a pillow between them to avoid each other. Lu Ming woke up early the next morning. It was Su Tian who woke him up. She was still a child and knew that her brother’s friend was not a bad person, so she directly touched his face to wake him up, saying, “Brother, it’s time to eat.” Lu Ming thought he was a pervert. He could even dream about it. He was startled when he woke up early in the morning and saw her, so he quickly got up. Su Tian was scared by his actions and ran away. Lu Ming quickly got up, washed up, and saw a WeChat message from Su Qiao saying: 【My parents have something to do, so I’m going to their place now. After you wake up and have breakfast, leave without disturbing my sister. Remember to lock the door when you leave, so she doesn’t go out.】 Lu Ming finally calmed down after seeing this WeChat message. Now he went out and saw Su Tian sitting obediently in the dining room, eating breakfast and drinking porridge. After licking his lips, Lu Ming also followed to the dining room. He was a bit hungry. Su Tian saw him coming and went into the kitchen to get him a pair of chopsticks and a bowl, letting him also have some porridge. Lu Ming couldn’t stand the smell on her body. It was too milky. He felt that at his age, smelling this scent was a bit… uncomfortable. Su Tian sat obediently in her seat and ate. Really, besides her appearance, everything she did was like a child. Lu Ming felt shameless. She was just a little sister, but he could still get an erection. He swallowed a mouthful of saliva and couldn’t eat anymore, so he quickly went into the bathroom to masturbate and ejaculate. When he woke up earlier, he was startled because he had morning wood. It went away when he washed up, but now it has come back. He felt uncomfortable, so he wanted to solve it in the bathroom. He went into the toilet, took off his pants and underwear, and looked at the erect shaft in his crotch. He skillfully reached out and masturbated up and down. When he came in just now, he forgot to lock the door. It caught him off guard, and he was breathing heavily. Just then, Su Tian opened the bathroom door. As soon as she entered, she saw Lu Ming… masturbating. Su Tian looked at Lu Ming, her curious eyes turned, and then she lifted her skirt, took off her underwear, and said to him, “Brother, I need to pee.”