In Order to Pay Off the Debt, the Brother Sent His Sister to Pay Off the Debt?

[Single heroine + light novel + daily life] "I haven't paid you back, and I feel bad about it, so I decided to give you my most precious thing!" The call was made in the morning and the person arrived in the afternoon. Xie Feng, Jian An's loser friend, actually sent his sister over to pay off his debt, and said that his sister Xie Ying would take care of him until all the money was repaid. "Brother Jian An, long time no see. Please take good care of me in the future!" All the bad luck happened two months ago when Xie Feng asked Jian An for 200 yuan and said he wanted to go back to his hometown. But these are small things. During the time they lived together, Jian An discovered that Xie Ying seemed to have strange feelings for her. ....... "Brother Jian An, breakfast is ready..." "Brother Jian An, who is that woman?" "Brother Jian An, do you want to eat first, take a shower, or..." "Brother Jian An, don't you think we look like newlyweds now?"