Virgin Night

Both are pretty normal vanilla stories with slow/romantic warm-up and some good action scenes. 

Both are very different from typical hentai. The couple are monogamous, in love and it is not sleazy. There's no weird tentacles or anything like that and both are based on normal couples. Well, couples that are more normal than the hentai standard. 

Cute girls with normal boyfriend. Both are sweet and heartwarming and...yeah they're very good.  

Virgin Night is very much like Suika when it comes to the issue of romance and feelings between first timers. Virgin night dives more into the emotional aspect of ones first time and doesn't involve any weird kinks or angles. It is very slice of life and highly reccomended if you're into romance softcore titles like: Suika, End of Summer and ONE: True Stories.  

They're both emotionaly charged romance themed drama's with a lot of charm and beautiful animation. If you're looking for a hidden gem on the realm of tentacles and exploitation this is for you. Don't be fooled by the cover art it's quite something else.  

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.