The Eldest Sister Is Like Mother, the Second Sister Is Like Friend

My parents went out to work, so I, the youngest in the family, had to accept the supervision of my strict and attentive eldest sister to follow daily rules and control my words and deeds at all times. On the other side, there is a gentle and considerate second sister who loves to protect her. Later, the relationship between the eldest sister and my best friend Li Mumu's brother became closer and closer. With the completely different care of the two sisters and the company of my best friend Li Mumu, they slowly grew up.