At this point I wonder what would people actually learn by reading that manga.
I would probably say it's false advertiment. The game isn't nearly as fun as Riyo is making it seem. We don't even have a single one of Riyo's special crazy character nor is there any type of Mashu abuse.
Also, it's not here but the "learn" parts are in the extra bit of commentary on the bottom after the comics.
Jack seems nonchalant even in the face (or rather, stomach) of certain doom
Jack: "This is fine. I'm okay with the events that are currently unfolding."
Good girl!Ah.....Berserker!How many times do I have to say that you can't eat your friend's limbs!You do lack a sense of humanity after all!You should've played along with them instead!Argh! Again!!Here, the dinner's ready!Jack, your sacrifice won't be in vain..."The Jack Speciality Hamburger"!Berserker is crying...Even though parsley is bitter, you properly ate all of it...Seems like she understands the sense of guilt and loss through eating her friends.