BGMについてTrack:3rd Prototype - I Know [NCS Release]Music provided by NoCopyrightSounds.Watch: https://www.youtube.com/watch?v=ZRnrjxDKv6QFree Download / Stream: http://ncs.io/IKnowYOyoutube で見る https://www.youtube.com/watch?v=ciN9412lCbA&feature=youtu.be