I can hear the harmony of your heartbeat

Nanase Riku at the age of 13 seemed to have been killed by the god of death because he suddenly had a severe fever and was tormented by asthma, but he fortunately escaped the scythe of death. But that scythe had robbed him of almost all of his hearing, making him not only live in the suffocation of each asthma attack, but also with four walls of silence, that incident robbed all of the beauty color in his life

Riku has an older brother, a twin brother, and his name is Nanase Tenn, but he can no longer hear his voice, he still remembers how desperate he was, hurt, how painful and how hard he tried to scream when he found out he couldn't hear the sound coming from his own throat anymore. At that time, Tenn was still next to him, Riku could feel his small hand shaking but he still had a gentle smile on his lips as usual.

And he heard a melody of resonance, a melody from a voice he was all too familiar with. He could hear the song Tenn sang.

That's all, that's all he needs, a sound, a song to comfort him, remind him that he's still alive. Riku had thought that his world was now just his voice, but such thinking proved to him how small the world was in his eyes.

That day, he met a teenager, no matter how loud the sound of the water fountain was, he could only hear the boy's voice. The world in his eyes is once again widening
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