Does anyone know what ep is this pic from?

Either it's fanmade 或者 it's just a picture; that wasn't in an episode.

if u look closely at the picture it says gauken 黑塔利亚 on it so that must mean its a 照片 from the game XD

It's just official art associated with the game "Gakuen Hetalia", surrounding Seychelles. The pic in the 最佳, 返回页首 right must be a drawing from an event in the game..