Foreword: I had to break the merveilles streak I had going on because I love this diva. I am so mad at them for not recording it, and as a consequence, we don't have written lyrics, and there are a couple of live versions where I think there might be different lyrics.
Random fun fact: the instrumental is really similar to U・RA・GI・RI, a song by Matenrou, which was Mana's and Közi's band before Malice Mizer. 
I will just write down what I hear, feel free to tell me what you think and help! 

Listen here (loud Tetsu alert)
Or here 

白昼のワルツ

Ah...声は切なくこの夜を包む青い光を…

幻の中青い光は
目を閉じたまま
夜僕は   絵怪笑の人達は  *
息を止めてる

I'm your rival *...この身を
You're my rival *... 夢へ誘え

息を殺して
辺りを疑う
子供の威張り *
I cry *...

Ah...声は切なくこの夜を包む青い光を…
Ah...風が揺れず忘られる景色無意味の当てまで

夜に騙されて
開く花の刺を無くして

I'm your rival, この身を
You're my rival, 夢へ誘え

Ah...声は切なくこの夜を包む青い光を…
Ah...風が揺れず忘られる景色無意味の当てに
Ah...声は切なくこの夜を包む青い光を…
Ah...風が揺れて忘られる景色無意味の当てまで

*Not sure about the "I'm your rival" but I can't unhear it. I also thought of "I'm your life/You're my life" but it didn't convince me. The same goes for the "I cry". What do you think?

Hakuchū no Waltz

Ah... Koe wa setsunaku kono yoru wo tsutsumu aoi hikari wo...

Maboroshi no naka aoi hikari wa 
Me wo tojita mama
Yoru boku wa e kaishō no hitotachi wa  *
Iki wo tometeru 

I'm your rival *... kono mi wo 
You're my rival *... yume e izanae

Iki wo koroshite
Atari wo utagau 
Kodomo no ibari *
I cry*...

Ah... Koe wa setsunaku kono yoru wo tsutsumu aoi hikari wo...
Ah... Kaze ga yurezu wasurareru keshiki muimi no ate made 

Yoru ni damasarete
Hiraku hana no toge wo nakushite 

I'm your rival, you're my rival 
I'm your rival, kono mi wo 
You're my rival, yume e izanae

Ah... Koe wa setsunaku kono yoru wo tsutsumu aoi hikari wo...
Ah... Kaze ga yurezu wasurareru keshiki muimi no ate ni
Ah... Koe wa setsunaku kono yoru wo tsutsumu aoi hikari wo...
Ah... Kaze ga yurete wasurareru keshiki muimi no ate made 

Midday Waltz

Ah... your melancholic voice, the blue light that envelops this night... 

Inside of visions appears the blue light
As I keep my eyes closed
And the people smiling ghastly in the painting at night  *
Stop my breath

I'm your rival *... this body of mine...
You're my rival *... lure it into your dreams 

Holding my breath 
Suspicious of my surroundings 
With the arrogance of a child *
I cry *...

Ah... your melancholic voice, the blue light that envelops this night... 
Ah... without the blowing wind, the landscape is lost up to a meaningless hope

Deceived by the night 
Remove the thorns from blooming flowers 

I'm your rival... this body of mine...
You're my rival... lure it into your dreams

Ah... your melancholic voice, the blue light that envelops this night...
Ah... without the blowing wind, the landscape is lost in a meaningless hope
Ah... your melancholic voice, the blue light that envelops this night...
Ah... the wind is blowing, as the landscape is lost up to a meaningless hope

Sooo I have MANY doubts [*] but this is the sense I can make out of what I hear. For example, the verb wasurareru 忘られる (passive form of "wasuru", to lose) seems like an archaic term, but I couldn't make out any alternative.
Another silly note: the part where it says "At night, the people smiling ghastly in the painting" is the one that made me suffer the most and my transcription feels like a stretch, let alone the translation. However, in the first video I linked, you can see Tetsu kind of gesture a smile with his finger, before mimicking the "Stop my breath" (which I'm sure of), so why the hell not! 
Of course this air of mystery makes this little diva all the more special and every new perspective/idea is welcome! And obviously I will continue listening so there WILL be updates.

In the meantime thank you for reading and thanks to Maiden Death for the code and the help with the English rendition!