Another Episode is a series of voice dramas for the hero and heroine candiates (12 total) composed of newly recorded voice-overs and illustrations. The previously teased Ventuswill Another Episode is included with the game.
The Another Episode add-on that includes all the non-Ventuswill voice dramas will be released on July 25 in Japan for free until August 26. After that, it will cost 700 yen.
Rune Factory 4 Special is due out for Switch on July 25 in Japan and in 2019 in North America and Europe.
Thanks, Games Talk.