菇凉把你的心交给我骚年一颗心省着点玩
[gū liáng bă nĭ de xīn jiāo jĭ wŏ sāo nián yī kē xīn shĕng zhe diăn wán]
Using casual, somewhat playful slang to express serious intention toward developing a deeper relationship. 'Give your heart to me' shows sincerity; 'save my heart carefully' suggests treasuring feelings seriously despite using lighthearted language.