Romanji:
Anata wa nii-sama no tomodachi
Shiroi hoho wo [bad word] shounen
Watashi akogarete-ita no
Tatoe donna ni jama ni sarete mo

Ibara no niwa wo oikaketa keredo
Anata no me ni wa itsumo
Nii-sama ga utsutte-ta
Doa no kage kara dakiau futari wo
Hajimete mita toki totemo kirei de
Mune ga sawai da

 [bad word] nowaaru
Nanimo shiranu
Shoujo no hi no hatsukoi yo
 [bad word] nowaaru
Ima mo amai
Anata no koe ga [bad word] 

 [bad word] hi nii-sama ga ie wo dete
Anata mo nido to konakatta
Kaa-sama wa nageki kanashimi
Ie ni wa akari mo tomoranai

Otona ni [bad word] made shirazu ni ita no
Machi-hazure no mizuumi ni
Futari wa shizunda to
Kami ni somuita ai no mukui da to
Hito-bito wa sasayaku kedo watashi wa
Me wo [bad word] dake

 [bad word] nowaaru
Mizuumi no hotori
Sotto saita suisen wa
 [bad word] nowaaru
Aa donna ni
Ayashiku kawatta deshou

 [bad word] nowaaru
Are kara watashi
Donna hito mo ai senai
 [bad word] nowaaru
Ima mo kawaranu
Anata no sugata ga [bad word] 

 [bad word] nowaaru
Nanimo shiranu
Shoujo no hi no hatsukoi yo
 [bad word] nowaaru
Ima mo amai
Anata no koe ga [bad word] 

English translation:

You were my older brother's friend
The boy with white cheeks
I found myself longing for you
Although I had one obstacle

I chased you through a garden of thorns, but
What was always reflected in your eyes was my brother
When I first saw the two of you embracing in the shadow of the door, it was beautiful
My heart skipped a beat

Narcisse Noir
I don't know a thing
It's just the day of a girl's first love
Narcisse Noir
Even now, it's sweet
I can hear your voice

One day, my brother left our home
And you never returned again
My mother lamented in her sorrow
And no light shone in our home

Until I [bad word] an adult, I won't understand what happened
I'll go to the lake
Where you two sank down in sadness
I'll disobey God and accept the punishment for loving
People will whisper, but
I will just close my eyes

Narcisse Noir
In the vicinity of that lake
The narcissus are blooming
Narcisse Noir
Oh, am I really
 [bad word] so cynical?

Narcisse Noir
Since then, I have wondered
What sort of people cannot love?
Narcisse Noir
Even now, I do not change
I can still see your figure

Narcisse Noir
I don't know a thing
It's just the day of a girl's first love
Narcisse Noir
Even now, it's sweet
I can hear your voice