Hakuyoku no Sekiyaku ~Pure Engagement~ / Oboeteiru Kara

Hakuyoku no Sekiyaku ~Pure Engagement~ / Oboeteiru Kara (白翼ノ誓約～Pure Engagement～/おんなじきもち) is a collaboration character single by Endo Aya, Hanazawa Kana, Hayami Saori, and Inoue Marina. It was released on July 21, 2010, and peaked at #13 on the Oricon single chart.

Single Information
The tracks Yakusoku I'm with You and SURVIVE BABY SURVIVE were used as the opening and ending theme for the anime Sekirei: Pure Engagement.
 * Catalog Number:
 * SVWC-7705 (Regular Edition)
 * SVWC-7703/4 (Limited Edition)
 * Lyrics: Yasukawa Shogo (Track 1), meg rock (Track 2)
 * Composition: Okabe Keiichi (Track 1), Kosaki Satoru (Track 2)
 * Arrangement: Okabe Keiichi (Track 1), Takada Ryuichi (Track 1), Kosaki Satoru (Track 2)

Tracklist

 * 1) Hakuyoku no Sekiyaku ~Pure Engagement~ (翼ノ誓約～Pure Engagement～)
 * 2) Oboeteiru Kara (おんなじきもち)
 * 3) Hakuyoku no Sekiyaku ~Pure Engagement~ (Off Vocal Version)
 * 4) Oboeteiru Kara (Off Vocal Version)

Featured Artists

 * Endo Aya as Matsu (松)
 * Hanazawa Kana as Kusano (草野)
 * Hayami Saori as Musubi (結)
 * Inoue Marina as Tsukiumi (月海)