To be honest, I don't feel like elaborating right now and probably won't come back to do so later, so let me just say this:
I don't think the "male lead falling in love first" or "unexpressed feelings" tags apply, mostly because it wasn't at all clear who fell in love first and there were no unexpressed feelings that I noticed. So, if either of those tags might stop you from reading it, read on. ^^
And also, I have no idea what the heck is up with that second description but it is nothing like that. The only thing that description accurately summarizes is the fact that she has a tutor. -_-
There aren't actually that many scenes that take place during the night time, and I can personally guarantee those that do have absolutely nothing to do with him teaching her stuff, especially the kind of thing the description made you think he'd be "teaching" her. xD
In fact, he was actually one of those "I know my place", hands off type male leads. Much closer to Ojou-sama no Untenshu than something like Shinjo Mayu's Junai strip.
Though unlike in Ojousama no untenshu, in the case of Renai demo classic his status was not even brought up as an obstacle to their relationship.
Aaand I'm getting off-topic now, so let me end with this: It's a cute, short read with lovely art and a pleasant story, as well as a non-whiney, non-annoying female lead who likes a guy who isn't an aloof a-hole and actually has feelings. And by that I mean he blushes and we saw him crying in flashbacks because blushing and crying are things that all people do, regardless of gender.
...I went on a tangent again. I'm way too tired right now. -_-
Anyways, it's recommended. xD