Through the dusty old DV in the club warehouse, Gu'an found a spark from three years ago that shouldn't have existed here, a senior named Xinghuo. ——Why are you fading away in the night sky? Why am I the only one who can see you? For the first time, Gu'an, who has always gone with the flow, had the urge to unveil the truth. As observers, agents, and the most important partners, Gu'an and Xinghuo embarked on a journey to retrieve former club members who are now lost in different parts of society, finishing the unfinished journey from three years ago... “Of course, you knew all along.” “But I’m really happy. Thank you, Gu'an.”