希望之歌:http://www.bilibili.com/video/av2810183/
ButterFly 2015 arrange:http://www.bilibili.com/video/av2494394/
离去之原:http://www.bilibili.com/video/av2454490/
ButterFly 2015 arrange:http://www.bilibili.com/video/av2494394/
离去之原:http://www.bilibili.com/video/av2454490/