Music Video 2021-03-31 「幸福論」ミュージックビデオ公開!!The music video for “Happiness theory” has been released! 3月3日にリリースした配信EP『UNDEAD CYBORG』より「幸福論」のミュージックビデオを公開! The music video for “Happiness theory” from the distribution EP “UNDEAD CYBORG,” released on March 3, has been released!