PENGUIN RESEARCH – ボタン / Button
Track 11 from Album "敗者復活？自由形 / Haisha Fukkatsusen Jiyuugata (패자부활전자유형)"
Release Date: 2017.03.10
PENGUIN RESEARCH – Alternative (PGR Version)
Track 04 from Album "敗者復活？自由形 / Haisha Fukkatsusen Jiyuugata (패자부활전자유형)"
Release Date: 2017.03.10
PENGUIN RESEARCH – ボタン / Button
Track 01 from EP "ボタン / Button - EP"
Release Date: 2016.09.30