All your songs were for her. She just didn't want to listen.
Or
When inspired and loved up (Y/N) (Y/L/N) writes all her songs about local bad girl Ka...
"Why do you like Kiwi?" Tzuyu asks Y/N
"Because it's Sweet & Sour like my life but more of the sour part." Y/N answers while staring deep into Tzuyu'...