Artist
Nogizaka46 (乃木坂46)
Composer
Amber
Arranger
Wakatabe Makoto
Kanji Title
口約束
Romaji Title
Kuciyakusoku
English Title
Verbal promise
Album
Sorezore no Isu (Nogizaka46)

Performing Members
1st Generation: Akimoto Manatsu, Sakurai Reika, Nakada Kana, Wakatsuki Yumi

Source: http://stage48.net/studio48/kuchiyakusoku....