Yuuma arrives at the Hakurei Shrine to suggest making an alliance between Gensokyo and the Gouyoku Alliance due to being beaten by Flandre, only to be rebuffed by Reimu, who states that no one in Gensokyo wants anything to do with the Animal Realm. As Yuuma wonders where Flandre is exactly, Okina and Flandre talk within the Scarlet Devil Mansion, where the former reveals that the Yuuma Flandre faced and destroyed beneath the earth had absorbed the greed of the Hell of Blood Pools, and the one currently on the surface is a completely different individual who merely absorbs the greed of the surface world, which the vampire doesn't fully understand but decides to just roll with. Flandre also expresses the desire to destroy Yuuma if they ever meet again, which Okina is willing to facilitate. Ultimately, after talks with those in both the surface and Former Hell, Yuuma agrees to co-manage the Hell of Blood Pools with Okina, and learns that oil spills are a serious problem in the surface world.
It is revealed that Okina was the true cause of the oil leaks in Gensokyo, having caused them to attract people to the former Hell of Blood Pools in order to have Gensokyo deal with a common enemy in Yuuma. For those aware of oil's dangers, Okina being in charge is seen as a good thing because her nature as a secret god who makes things hidden keeps the oil safe deep underground, alongside Yuuma's more disturbing elements.