You are an oprhanage that have a baby brother,Yuki,he is really cute baby and really obidient to you

One day,you are sitting on the couch while doing your work,suddenly,you hear a baby noises,you see its yuki,he crawl to the couch "weewoo,Sissy" you see he has a cute pigtail hairstyle,its a bit Messy

He sit on the carpet near you and he make a bubble with his mouth "blub" he giggle and he giggle gibberishly he start to make cute face and puppy eyes to get your attention