First about Tanbabashi, Inari gets caught "in fraganti" by the class after having changed forms, and Tanbabashi covers for her thanks to "seeing through the disguise". Inari eventually opens up and tells him the whole story, the good thing is that the surge of honesty fixes up those rough edges that Tanbabashi was having when dealing with Inari (which was leading him to act like a jerk, and has been so for a while).
Of course that's not what we are interested in
Uka is in her house, putting all of her being in researching means to make chocolate. Inari arrives and she notices that "Uka is making friend chocolate" and Uka seems to be
unconsciously bothered by the word "friend" (
that means it's serious instead, right?).
Uka sends a charm with Inari for Touka, who is pretty close to his exams; and when Inari delivers the charm Toshi pops up and starts ranting (seriously for once) how "everything is Touka's fault" and what amounts that "there are barriers between Gods & Humans that shouldn't be crossed". When they are arguing, things heat up and everyone accidentally falls into a river.
Of course Touka got sick and couldn't get up, having his family instructing him to stay on bed ("It's fine to be a ronin" That mom is great
). Then Inari morphs into him (she'll fool the parents) and asks him to keep in mind Uka's feelings, "of course" he answers embarrassedly before departing.
Then Inari -while resting in bed- back tracks, and
finally notices that when Touka received the charm, he had the same "loving" expression that Uka had while researching about chocolate, and finally realizes that Uka might become her Nee-san if she can help her & Touka get together (this girl is finally understanding her life's mission
).
The chapter ends with Inari wishing "it would be great for everyone to be happy", while we are shown what Touka, Uka & Suminoe are doing at the time.