I've recently been enjoying the gameplay and story of Eiyuu Senki and Venus Blood Frontier. Both of these games are about fighting to control the world while screwing along the way.
Eiyuu Senki is safe bet, having tame content and a refreshing combat system. While the story is about you conquering the world in the name of peace.
Venus Blood Frontier is a bit more potent, having tentacle training and another detailed combat system. This one's story can get pretty crazy at some points.
If you want to go down an even more story driven game, I would recommend the JRPG Evenicle. The gameplay is simple and easy for most of the game (with bosses and mega monster being the exception). When the gameplay gets tough, it doesn't feel like it is a leveling issue, I never grinded for XP during my playthrough. The only thing I grinded on was the wonderful supporting cast, after I got the divine paperwork to allow it. The story is fun and there's a reason why there are so many people asking for games like Evenicle. (The game does contain vast amounts of tags, so I would like to remind you that you don't need to polish your knob every time)
If you can stand it taking a while, there's Sengoku Rance, a turn-based strategy game. Just be warned, it takes a lot of save-scumming and following a guide for the story mode is recommended.