Giyuu reflects back on his past, to the present day of him being a demon who is now a part of the 12 kizuki, questioning whether he made the right decision of becoming a demon or not. The insect pillar, off to a new mission to a village, smells a demon scent not too far away. She follows the scent, to find an old friend, who's now a demon. Long-gone, Shinobu must make a decision. Save Giyuu from himself and break the demon slayer corps rules, or finish her duty as a hashira.