| There's only one thing you have to keep
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| My only 1
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| My heart for you hasn't changed
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| It's not like I was hoping for a miracle
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| When the secret is revealed, then you will know
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| don't let go of your hand don't let go
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| When gray clouds block us
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| I'll make it rain and roll it up brightly
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| When I hug you, the petals flutter
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| It becomes a secret and I fill it up
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| There's only one thing you have to keep
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| It's you, it's true, my only 1
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| I will shine on you until the end of the moonlight world
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| one full
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| the two of us forever
 | 
| You're my only 1
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| You're my only 1
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| Don't think you're just young
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| You know each other better than anyone else
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| When the darkness brightens, then you'll smile
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| Will you trust me, will you follow me?
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| Lost hearts and long dreams
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| With a tender heart that I only wished for, sad memories
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| It bloomed only when I hugged you
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| I'll fill you up with petals
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| There's only one thing you have to keep
 | 
| It's you, it's true, my only 1
 | 
| I will shine on you until the end of the moonlight world
 | 
| one full
 | 
| the two of us forever
 | 
| on a starry night
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| Be the brightest star among them
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| Even if the road is rough, follow the light
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| I'll find it without hesitation
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| You're my only 1
 | 
| There's only one thing you have to keep
 | 
| It's you, it's true, my only 1
 | 
| I will shine on you until the end of the moonlight world
 | 
| one full
 | 
| the two of us forever
 | 
| You're my only 1
 | 
| You're my only 1 |