- Oku Hanako
- Koi Tsubomi (恋つぼみ; Love Bud)
- Catalog Number
- Koi Tsubomi (恋つぼみ)
- Koi Tsubomi (Piano Hikikatari) (恋つぼみ(ピアノ弾き語り))
"Koi Tsubomi" is Oku Hanako's third single. The title track was used as theme song for the TV show Minna no Uta sice February to March, and since October to November. No music video was produced for the song. The single reached #67 on Oricon charts, and charted for 2 weeks.