Back to work on the summaries.
Volume 5 chapter 3:
After spending time at the cake shop and having lunch, they decide to go do a bit of shopping. Rinslet goes to buy some clothes for her sister and convinces the other two girls + kamito to go with her.
Claire asks Kamito to wait for her to change so she can get his opinion. Too bad, Ellis decides to go on the offensive, grabs Kamito, and coerces him into choosing her a set of underwear
. He ends up picking her a nice set of black lace ones.
They finally end up making their way to the library to do a search. They decide to split up and look in different sections. The girls find a book of forbidden "spirit techniques", which is basically a guide on how to use spirit magic to masturbate. Kamito finds a bit more about the history of the Demon Slayer, but nothing concrete. However, he gets ambushed by Leonora.
She apologizes for trying to cut off his penis while on the cruise to the venue. Now she has different instructions from her country. She aggressively throws herself onto Kamito and he notes that she is a completely different personality that before.
Eventually, they leave the library and they weren't actually able to find out anything of importance about Est.
The chapter cuts to Fianna begging the guards outside the main temple to let her in to see the holy priestess of Fire, Reiha. Unfortunately, they ignore her and kick her out.
Chapter 4:
The group returns to their rooms, and Rinslet's little sister runs up and gives Kamito a hug. Turns out she likes Kamito too, Carol remarks how he has both Rinslet AND her sister in his hands. Rinslet's sister remarks that she doesn't mind. And Ellis can only remark how jealous she is before she changes her mind and decides that its indecent. Rinslet's sister is here to cheer and wishes her older sister the best of luck in getting their sister Yudia back.
Kamito is confused but she explains how her sister was gifted and was in line to become a holy priestess of water but somehow she offended the water king and was permanently frozen in a block of ice. Her wish is to ask for the water king's forgiveness to save her sister.
After all that, Fianna shows up and says that it's time for her date with Kamito. Or rather she's figured out who it is that can help remove the dark seal and she needs him to infiltrate the temple with her to meet this person. To accomplish this, they need a disguise to blend in with the other priestesses. Fortunately for them, Kamito is "rather good at cross dressing".
Chapter 5:
They infiltrate the temple using a passage underneath the temple. Fiana says she was taught this route by Claire's older sister. They head into the inner chambers and manage to meet the holy priestess of fire, Reiha.
On the way through the caverns underneath the temple, they overhear the summoning of Nepentus Roa, the embodiment of the will of the demon lord, by the fake Ren Ashdoll. They don't realize what they hear and continue onwards to see the holy priestess of fire.
Reiha is shocked to see Kamito, but extremely happy to see Fianna. Turns out, she claims that Fianna is probably her one and only friend. She diagnoses the dark seal and concludes that she can only remove it with the flame she received from the fire lord. Normally, it's only reserved for official use and she cannot use it for personal reasons, but she decides to help Kamito because Fianna is asking.
Meanwhile, Claire is moping because she was left behind and starts masturbating using some spirit fossils and the technique she learned from the forbidden book. (I know, I wish I was kidding)
She burns the seal, as she burns the seal. The spirit seal on Kamito's right hand glows brightly. He passes out from the pain in his chest and Reiha starts burning the dark seal.