The last lyric is "Love you forever". What song is it?

Song: The Convention of Rainbow

Kiss

I made an agreement with you with a rainbow.

After the storm

Sunshine will smile.

Safe growth

Meet the future of hope

Like red, orange, yellow, green, indigo and purple.

Kiss

I made an agreement with you with a rainbow.

Walk through childhood memories together

Happy growth

Meet a bright future

Like red, orange, yellow, green, indigo and purple.

Rainbow is the promise of hope.

And the truest love.

The queen in my heart/kissing the baby

We love you forever.

Rainbow is a happy agreement.

This is also eternal love.

The queen in my heart/kissing the baby

Always with you

Kiss

I made an agreement with you with a rainbow.

Walk through childhood memories together

Happy growth

Meet a bright future

Like red, orange, yellow, green, indigo and purple.

Rainbow is the promise of hope.

And the truest love.

The queen in my heart/kissing the baby

We love you forever.

Rainbow is a happy agreement.

This is also eternal love.

The queen in my heart/kissing the baby

Always with you

Rainbow is the promise of hope.

And the truest love.

The queen in my heart/kissing the baby

We love you forever.

Rainbow is a happy agreement.

This is also eternal love.

The queen in my heart/kissing the baby

Always with you