My Adopted Sister Came from Heaven, and After We Moved in Together, I Made Her My Girlfriend

[Single female protagonist + slow pace + daily love life + two-way redemption + pure brother-sister relationship] Bad news: When he woke up, Chen Huai learned that he had an extra sister inexplicably, and he had to take care of her? The good news: Mom is okay with him having sex with her while she's taking care of her. Chen Huai:...... Damn it, this is all bad news. In this way, a seemingly 'perfect' girl, Gu tide, was added to Chen Huai's family. To outsiders, she is cold, withdrawn, and unapproachable. But in Chen Huai's view, this is just a random evaluation given by outsiders without any understanding. Replacing the evaluations with social anxiety, introversion, and roadblocks would still be the same. She originally thought that the relationship between the two ended with brother and sister, until Chen Huai continued to insist on a meaningless job for him, and the girl asked: "You didn't answer me this question last time. I want to know the answer this time. Why are you so nice to me?" "I don't know. Maybe I want you to feel more at home in this family." From then on, the girl's behavior became increasingly strange. He changed his previous temperament and often stuck behind Chen Huai. "Chen Huai, do you know what giving chocolate today means in Japan?" "Chen Huai, I've finished reading the love novels you wrote before. There are so many heroines, which one do you like?" At first, Chen Huai didn't take the girl's change in other directions until... Chen Huai: No, what do you mean when you say you like me? ! (A reminder from the front row, although the content is fake bones, the proportion of bones may be a little small. It is recommended that you read it as a sister romance novel. If you can't accept it, don't read it.)