sweet voice; seductive voice
Describes a voice that is gentle, alluring, or coaxing, often used when someone is trying to persuade or charm another person.
彼女は甘い声で「お願い」と言った。
She said 'please' in a sweet voice.
甘い声に騙されないで。
Don't be fooled by a seductive voice.
Compound of 甘い (sweet) and 声 (voice). The phrase is transparent and its meaning is directly derived from its components.