S1·E7 I'll Be Back Soon, We'll See Each Other Soon.

As the second summer arrives, the Winter Kingdom has improved significantly with the Crimson Scholar sending one of her students, the Merchant Youngster to help the Winter King. After training with Female Knight and tasting Younger Sister Maid's carbonated drink, the Hero heads back to Gateway City as the Black Knight to attend a festival. While feasting with the Eastern Fortress General, the Fire Dragon Princess, daughter of the Archduke Fire Dragon, arrives much to Hero's chargin as the Princess considers herself as the Black Knight's wife. Realizing time is running out for her, the Scholar brings Hero along with Elder Sister Maid, whom has become her apprentice, to the Iron Nation to show a new invention that will improve the education of the humans, the Printing press.