你怎么那么萌啊因为我是姐姐啊
[nĭ zĕn me nèi me méng a yīn wéi wŏ shì jiĕ jiĕ a]
How Can You Be So Kawaii? Because I'm The Eldest Sister uses playful language where one acknowledges their maturity yet retains an unexpected charm or cuteness despite being older sibling-like figure