This manga is a bit better than your average light novel adaption trash. I didn't know anything about this manga before I read it. Apparently there are different paths or something that the main character takes. This manga follows the Celia path.
The main problem with this manga is the story. The plot is all over the place. It starts with a dream sequence but then it turns out the dream actually happened in the past. It doesn't help that most of the girls look the same so you can't tell who is who. I thought this would be interesting because of the jousting but the jousting takes the backseat to the crappy romance plot. Of course, I didn't continue reading this for the plot. I continued reading it for the "plot".
The ecchi parts in this are your average fall-over on main character, guy grabs boob misunderstanding, up-skirt panty shot kind of thing. However, where this manga shines above most others in it's class is the nipples. These aren't the girly nipples you are used to seeing in anime and manga. These are women's nipples. They are puffy and big on the big breasted women, and more modest sized on the smaller girls. They are fantastic and are shown quite often in the manga.
The nipples and the very end of this manga are the only things that set this apart from other crap of the same genre. If you aren't interested in that then don't read it. The jousting part is usually skipped over; you see a flash of lances then the next scene begins. If you just want a quick read with a semi-satisfying ending and boobs, then I would read it.