Let's play a game /a/. You will be put in a room with your waifu an hour after reading this. You will be allowed to bring only one item you possess or can currently afford to buy. Once you're inside the room, you will have to convince her to marry you. If you win, you get transported to her world and live with her, if not you get transferred back to our world(or get killed if your waifu is dangerous enough). No powers. You can use everything you know.

I'll start. My plan is pretty simple. In an hour I will memorize all the knowledge I can about a certain medicinal practice correlating it to nen. I will bring a fully charged phone with me claiming it is an object I conjured with nen containing documents about everything that will get her curious enough to not get bored of me and kill me. I will tell her that I can only generate information with my phone an hour per day and with a condition that nobody else but me can use my phone and that I also die if it breaks. I will also tell her she can use me as a lab rat to test all her experiments on. Once I convince her, I will transfer everything on my phone via writing or some other way before the battery gets drained. With the amount of information I possess, it probably would last me till I die of old age. I would probably get killed the moment I arrive inside the room, but it's all that I could come up with a short amount of time.

You can poke holes in other anons' plans, improve them, or have a completely different plan. So, how will you convince your waifu to marry you?