I don't know. Asami can be pretty damned romantic. Setting up the fireworks just to please Akihito is one of the most romantic things I've ever heard of. The mangaka herself refers to this relationship as lovey dovey, so I think if they ever do go on a real date, it's going to be as romantic as hell. If Akihito admits his feelings far enough to agree to go on a date with Asami, Asami will lavish him with romance. And then hot hot sex.
I would like to see asami and aki go on a real date without bodyguard and any interruption. I imagine asami plan a private breath taking surprise date for aki. At this date they would have delightful dinner than top that with little dancing, :take a walk while the holding hand and gaze on each other eyes then lead to kissing and touching one another to the point they can!t hold back no more , ripe each other clothes off and then asami fuck the shit out aki and make him sing that sweet song he love to hear for aki mouth. I would like to know what kind of date you would want them to have and go wild with it if you choose to. We all grow up here..