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like abcrebel said eye contact is very important, her talking to you is much more important then on a regular type of scene. The JAV's are a good source for the type of closeness you tend to miss in western handjob scenes. when the guy is on his back in JAV she jacks him off while her face is hanging above the guys/your face, looking into your eyes and chatting to you or kissing you (real kissing not those air kissing from 25cm/10 inches away you can see too often in western scenes it doesnt matter if her face looks weird it looks the same in real life). Or she lift up his lower body so she her face and his package are closer to the camere (basically a cum in your own face position). Im at the moment scripting a dominant jav scene where she (kaho imai) jerks a guy sitting in a chair while she stands and leans over him her face inches from his. that closeness is what makes it special.
But you could also do partial pov and mix it up with closeups. as the one camera angle in handjob/blowjob only scenes can get very boring.
make it playfull, turn it into a game (like if you cum you have to do the dishes or something like it) give a simple reason why shes edging you. In this her being able to be "chatty" is very important so i would say pick performers that have a bit of experience in JOI they tend to be a bit more vocal. Performers like angel wicky, lauren phillips, marley brinx, nina elle, alura jensen, alex coal, georgie lyall, adriana chechik to name just a few.