Gyuu is the first studio album by Masami Okui, released on April 21, 1995.
- Includes a self-cover of the first song that Masami Okui composed and wrote the lyrics herself Moonlight Angel ~Ashita ni Mukatte~ (Moonlight Angel〜明日に向かって〜).
- Reincarnation
- OVA Tekkaman Blade II opening song
- Lyrics: Satomi Arimori
- Composition: Takashi Kudo
- Arrangement: Toshiro Yabuki
- Moonlight Angel ~Ashita ni Mukatte~ (Moonlight Angel〜明日に向かって〜)
- I Was Born to Fall In Love
- OVA Compiler opening song
- Lyrics: Satomi Arimori
- Composition, arrangement: Hideya Nakazaki
- Ryoute ippai no Yume (両手いっぱいの夢)
- OVA Tekkaman Blade II image song
- Lyrics: Satomi Arimori
- Composition: Takashi Kudo
- Arrangement: Masami Okui
- Full Up Mind
- OVA Compiler ending song
- Lyrics: Satomi Arimori
- Composition, arrangement: Hideya Nakazaki
- Beats the Band
- Anime film Ghost Sweeper Mikami soundtrack
- Lyrics: Mamie D. Lee
- Composition: Makoto Ikenaga
- Arrangement: Vink
- Face
- Fushigi na Yoru (不思議な夜)
- Original song Okui made specially for this album
- Lyrics, composition: Masami Okui
- Arrangement: Toshiro Yabuki
- My Jolly Days
- Anime film Ghost Sweeper Mikami ending song
- Lyrics: Keiko Kimoto
- Composition: Tsutomu Ohira
- Arrangement: Vink
- It's Destiny -yatto meguriaeta- (It's DESTINY -やっと巡り会えた-)
- OVA Tekkaman Blade II ending song
- Lyrics: Satomi Arimori
- Composition: Takashi Kudo
- Arrangement: Toshiro Yabuki
- Energy
- OVA Megami Paradise image song
- Lyrics, composition: Masami Okui
- Arrangement: Toshiro Yabuki
- Live Alone... Sennen tattemo (Live alone...千年たっても)
- OVA Tekkaman Blade II ending song
- Lyrics: Satomi Arimori
- Composition: Takashi Kudo
- Arrangement: Toshiro Yabuki
- Dare yori mo zutto... (誰よりもずっと...)
- OVA Girl from Fantasia theme song
- Lyrics: Satomi Arimori
- Composition, arrangement: Toshiyuki Watanabe
- Bay side love story -from tokyo-
21 April 1995