Girl's Day previously had a comeback in July 2015, nearly eight months ago.
The singer-actress mentioned that she would be working on music projects with the group for the next few months.
The idol actress had multiple reasons for choosing the specific charity she did.
The "storm" in the title refers to the only thing that can save a person in the midst of a ferocious storm: love.
The new boy band will release the full track on November 10.