ah good plan. right well here is a list of idea's that i think could work for a shippuden based naruto/hinata rp
1. Hinata finaly gets the courage to ask naruto out but miss understanding he thinks she means training so she attempts to make a training session romantic in some way.
2. set after the current events of shippuden, naruto is about to go off and fight sasuke for the final time and gets a visit from Hinata
3. certain members of the hidden leaf set naruto up by locking them in a house together with many couple like aspects to them
4. Hinata's father decides in a moment of insanity to make an arranged marriage between Hinata and Naruto and they are forced to live together
5. they get given a mission together that was meant to be simple but goes wrong, leaving them stuck in the wild together
if you don't like any of these idea's let me know and i would be happy to see what you have in mind.