The Tone-Deaf Healer Kills with a Song

Yeom Ye-ah, twenty-four years old this year. An utterly ordinary citizen struggling to pay loan interest day by day.
“Have you ever scored below 50 points singing your heart out on a karaoke machine?”
“Usually, that’s an error…”
“I have.”
An unprecedented tone-deaf person. And I Awakened. Even better, I’m in the rare healer class. So far, so good, but…
[Class: Melodic Healing Mage]
You’re telling me I can’t heal without singing?
“In this world, the one and only! My precious! That man! You are my! …Hey? Is anyone there? Someone’s collapsed here!”
Is this… really okay?