An Everlasting Kingdom「永遠の王国 Eien no Ōkoku」 is the 343rd chapter of the manga, Nanatsu no Taizai.
Q392. Rio-san (From Niigata Prefecture): Nakaba-sensei, have you ever thought you had changed between the start of this serialization and the present?
Nakaba: ...I put on a weight. Well, I did, so what?
Q393. Fundo no Butayarō: Griamore still hasn't made his appearance in the drawing on the volume spines!
Nakaba: O... oh craaaaaap!! I'm so sorry, Griamore!!!