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Koi wa 42°C is a romantic J-pop track set in a steamy hot spring at night.
It begins with playful energy, then gradually shifts into emotional heat as two people move closer.
The song captures the feeling of saying "I'm fine" while the heart keeps rising past its limit.
Cute on the surface, but subtly intense underneath, this track blends charm, tension, and sweet dizziness into one theatrical love story.
Blue Letter turns unsent feelings into music and visuals. Unspoken words, emotions that should have ended, and memories that still remain. Each release is shaped as an original song and cinematic music video within one continuous world. Created by C'est La Vie. Through AI visual direction, sound, image, and story are brought together into the world of Blue Letter.
Blue Letter Records