第 7 集: 雙星使喚出 Grave Buster 將 Suigin 拉入墓穴，讓他得以與祖父重逢
2017年5月13日 播出
Suigin is pulled into the world of "Grave Buster" by a woman named Twin Star. Surprisingly, Suigin ends up meeting his grandfather, Riku Yuuki, who should've been dead, and he can't hide his doubts about this whole situation. Then a woman named Shostia performs a ritual that reawakens Suigin's childhood memories. Before they can enjoy their reunion, they are attacked by someone... (Source: Crunchyroll)