I also like having a long hair! -> Your hair.. I also like it when it's long!
Given the context, figured Ganyu was talking about Lumine's hair, not her own.

Author's commentary:
Lumine and Ganyu
Casual flirting between a very honest, unassuming Ganyu and a slightly 'S' Lumine.

sharzik said:

I also like having a long hair! -> Your hair.. I also like it when it's long!
Given the context, figured Ganyu was talking about Lumine's hair, not her own.

Author's commentary:
Lumine and Ganyu
Casual flirting between a very honest, unassuming Ganyu and a slightly 'S' Lumine.

"Nervous laughing" Oh boy...