My Promise of Lifelong Companionship with My Younger Sister

On Feng Qiyue's first day at school, she met a pretty older girl and put her hand around the girl's waist. Later, she vowed to make her her friend, but slowly developed other feelings for her. "Sis, I think I've fallen for you. What should I do?" Ying Hanbing looked at Feng Qiyue. This little sister was so cute and adorably sweet. "Well... why don't we get together?" "Okay..." Feng Qiyue excitedly threw her arms around Ying Hanbing. Daily life: 1. "Sis, I want a hug." The little one held out her arms, pouting pitifully. 2. "Sis, why haven't you called me? It's been an hour. Sis, don't you love me anymore?" The little one sat by her phone, looking aggrieved. "Sis, I'll give you ten minutes. If you still don't call, I'm running away from home." 3. "Sis, let's promise to grow old together." Her older sister gazed at the little one, her affection undiminished. "Okay, let's promise to grow old together."