ピアノ×フォルテ×スキャンダル (Piano × Forte × Scandal)

Background
The song was first uploaded on December 20, 2008, and is OSTER project's first work using MEIKO; various utaites have covered the song. Unlike other works by OSTER project; she'd made the instrumental first before making the vocals sung by the Vocaloids. It was then when she bought MEIKO that she decided to use it as the vocals.

This song is featured on the albums OSTER-san no Best (with MEIKO Append), Cinnamon Philosophy, DEBUTANTE3, and Hatsune Miku "Magical Mirai 2014" Official Album. Covers and arrangements have been featured on additional albums.

Concerts
This song was featured in the following concerts
 * MikuPa Live in Sapporo 2013
 * MikuPa Live in Kansai 2013
 * Hatsune Miku Magical Mirai 2013
 * HATSUNE MIKU EXPO 2014 in Indonesia
 * HATSUNE MIKU EXPO 2014 in Los Angeles and New York