柠萌少女酸了心
[níng méng shăo nǚ suān le xīn]
'The lemon girl became heartbroken.' In China, a 'lemon girl' means a sour-faced, immature girl. Thus, she had initially been seen as immature and naive. Yet, her feelings now make her feel sorrowful. Overall, expressing that innocence may also encounter pain, which might come from disappointment and disillusionment of love.