Bravely Default Fairy's Effect is one of those upcoming mini mobile MMORPG's featuring real-time co-op and no stamina wall system. Square Enix recently released a new teaser trailer, but it doesn't really show much in terms of gameplay or graphics. Luckily, I still have some gameplay footage from the previous test for your viewing pleasure below. I'm a sucker when it comes to games with this kind of co-op system so I might play it on release unless the I get owned by the Gacha!
One of the key features of this game is being able to invade another player's battle real-time and vice-versa which supports up to 4 players in one fight. If you see someone fighting a mob on the open field areas, you can aggro that same mob and help them out. Players can also swap between various jobs anytime they want, as long as they're out of combat. You can manually dodge attacks by swiping up or down.
Game Site: http://www.bravely-bdfe.jp/