Inoue Kazuhiko (井上和彦) - Bara no Heya

Finally, after two years, I found it.

Serious, happy, and a little crazy. I simply love it (except for the screaming girls at the end.T.T I can't take really high, shrill voices)

It's from Rokumongentai Moncolle Knight
On animelyrics it says that Hikami Kyouko (Bacchi), and Imai Yuka (Guuko) accompany Kazuhiko in this song, so I guess they do the monologue part.

Lyrics:
Bara no Heya - The Rose Room

Moesakaru hono'o koe
harukanaru sekai no tobira hiraite
Doko made mo (doko made demo) hateshinaku (tsuiteiku)

tsuzuku sora tatakai [kanji: sentou] ga ima hajimaru

tegowai teki osore wa shinai
futatsu no sekai wo kono te de tsukamu wa kanarazu!
kuroi kumo wo akaku saite tate yo Prince of Rose

ima hateshinai yume idaku ai no senshi
aa kono mune no yabou koso ai no power

bara no hana wa utsukushiku soshite tsuyoku saki-midare
(utsukushiku, saki-midarimasu, madowasu no kaori de)
sou ware koso wa ayashiku saku aku no hana

(monologue)

maiagare kin'iro [kanji: ougon-iro] no
tategami wo nabikase mugen no sekai e
kaze ga naki (naki wa shinai) daichi furue (tsuraku to mo)

unmei no tatakai [kanji: sentou] ga ima hajimaru

kewashii michi osore wa shinai
atsui kokoro de nashitogeru wa kanarazu!
kuroi kumo wo akaku saite ike yo Prince of Rose
kuroi kumo wo akaku saite tate yo Prince of Rose