Gaijinworks has posted an English gameplay trailer for Summon Night 5 - a PlayStation Portable strategy RPG set to release later this year.
For collectors, the presale for physical PSP UMD w/ digital copy is ongoing on Gaijinwork's website until September 7th. Of course, Summon Night 5 will also be made available for purchase on PlayStation Network and playable on PlayStation Vita. You can find information and several screenshots for the game in an earlier post.
Summon Night 5 is a strategy-RPG with an extensive story and both event battles and side missions for a total of 70 battles if you want to see everything. It also has multiple endings and a fishing minigame. Players who just enjoy the story of RPGs but are bad at the battles will enjoy the available Easy mode which will let them get through the game concentrating on the story. All others can enjoy the challenge of Normal mode.