Realistic enough for a hentai. But hardly see any actual love. Most of the time it just "i never this close to a girl" or thing like that. This just mean this is a good deal. Get a fine looking girl as partner and you two used to know each other. And i fine with it. I guess most relationship is like that.
But with the title "Falling Together in Love" It just... expect something more... you know, pinky, fairy and pure and shit like that