Ep. 4: Aya confronts Hiroki as the Sword-Killer while Akira and Kengo battle Kokuchi threats.
Akira and Kengo learn about the Kokuchi and Shirogane from Aya, who forces them to observe her kendo lesson with teacher Hiroki Tsukikage. Despite her strength, Aya loses to her senpai, who promises Iai training with real swords the next day. Hiroki becomes frustrated by street corruption, encountering ungrateful students and prostitutes. News breaks of a Sword-Killer injuring people Hiroki saw previously. When Hiroki fails to meet Aya, Akira, and Kengo, Mayu is attacked by the killer for her attire. Aya intervenes, deflecting a katana strike, and Akira and Kengo arrive to help. The killer is revealed to be Hiroki. Akira and Kengo defeat the Kokuchi, prompting Aya to awaken her powers to finish them. Shirogane advises Akira to recruit comrades, leading him to accept Aya while dismissing Kengo’s request.
Episodes
- Ep. 1 · Akira meets a shadowless man named Shirogane who transforms him into a Shin to fight kokuchi monsters.
- Ep. 2 · Akira questions reality as Shirogane reveals their bond and they battle a Kokuchi at school.
- Ep. 3 · Akira and Shirogane confront Mayu's parasitic possession at Kengo's residence.
- Ep. 4 · Aya confronts Hiroki as the Sword-Killer while Akira and Kengo battle Kokuchi threats.
- Ep. 5 · Akira accepts Kengo as an ally after he proves his worth in battle against Kokuchi.
- Ep. 6 · The group visits Haruka Kujou and confronts escaped servants Kyou and Rin.
- Ep. 7 · Shou Mikami's secret identity as Shouko is revealed, leading to a Kokuchi possession incident.
- Ep. 8 · Saou Boys Club Rehearsal Accidents and Possession Incident