Provide a few pieces of pure music that I think are relatively gentle and soft:

Daylight of the evening

the forgotten lavender

Dance of the Fireflies

only wish

luv letter

Summer is coming

in love

Where the stars are

Lonely Pilgrimage

eyes on me

love song

river flows in you

The City of Neverwinter

Fleeing Time - Picture Sound (this is hard to find, but you can find it on songtaste or trend music website)

Luo Xuemei

These are personal and reading themes It's quite compatible, you might as well give it a listen.