There are many light music suitable for couples

"Kiss the Rain", "Canon", "Sad or Happy", "The Rain Must Fall", "One Man's Dream" and "Music Box Dancer" "Charming Eastern Love", "Prayer", "If Love Has Providence", "Wedding in a Dream", "Adilina by the Water", "First Snow", "Snow Dream", "Hannah's Eyes"

"Destiny" piano version, from the Korean drama "Full House"

"Romance of Love" was originally for guitar, but the piano version is also nice