Asumu begins his first day at Tachibana�s and discovers that Todoroki and Hitomi are related. Todoroki continues to fight the Bakegani as Kasumi notices something is wrong with him, while Zanki later arrives after he is called by Ichiro to examine a recording of Todoroki�s peculiar fighting style. Meanwhile, Hibiki practices on a dirtbike while waiting on standby�

Zanki visits Todoroki on the battlefield to question about his style of fighting while Asumu begins to have troubles at Tachibana�s and is then pulled into a conversation with Ichiro about the Oni. Hibiki later joins Todoroki in a fight against an Amikiri as Zanki makes a decision about his and Todoroki�s future.

After Sabaki is defeated by a Kappa, Hibiki is sent out to finish the job. At the same time, Asumu, Hitomi, Hinaka, and Todoroki enjoy the day off by going to a water park where they run into Tsutomu Tsumura, who works at the park but has ties to the Oni world.

Kogure Kounosuke, a strong-willed weapons designer for Takeshi, comes bearing a gift for the Oni who work at the Tachibana Sweet Shop: the Armed Saber. Unfortunately, the weapon is too powerful for a normal Oni and the repercussions for trying to use it is losing the ability to transform. But when a new Douji and Hime appear more powerful than any before, the Oni may have no choice but to risk using it in battle�

After losing the Armed Saber to the Super Douji and Hime, Hibiki and Todoroki lose the ability to transform. They find out that they will regain the ability to transform in one month, but that is too long with a Makamou running amok. Kogure suggests that the two Oni undergo a special training, under his guidance, to regain their powers.