Sentimental music, Reflective music, tender, nostalgic
overemotional, sickly, saccharine, sugary, sugarcoated, syrupy, romantic, hearts-and-flowers, touching, pathetic, twee, slushy, sloppy, mushy, weepy, tear-jerking, schmaltzy, cutesy, lovey-dovey, gooey, drippy, sloshy, soupy, treacly, cheesy, corny, icky, sick-making, toe-curling, soppy, cornball, sappy, hokey, three-hanky, Mills-and-Boon
nostalgic, tender, emotional, dewy-eyed, misty-eyed, affectionate, loving, softhearted, tenderhearted, soft, soft-centered, soppy
of or prompted by feelings of tenderness, sadness, or nostalgia.
"she felt a sentimental attachment to the place creep over her"
(of a work of literature, music, or art) dealing with feelings of tenderness, sadness, or nostalgia, typically in an exaggerated and self-indulgent way.
"a sentimental ballad"
(of a person) excessively prone to feelings of tenderness, sadness, or nostalgia.
"I'm a sentimental old fool"