 If you liked
Futari Ecchi
|
 ...then you might like
Virgin Night
|
In both there's the problem of first sex experience. However, in Futari Ecchi it is just one of the problems mentioned, while Virgin Night is fully devoted to it. Both are quite realistic and deal with the psychological aspect of intimate relations.
The difference is, Virgin Night is obviously a hentai, and Futari Ecchi isn't.