Y/N a otaku who likes reading manga i wonder what will happen I'm a terrible writer so don't expect much from this book

Y/n was a kid that's been worried a zombie apocalypse would happen after his parent died when he turned 15 (which are rich) he inherited their money he spent it on building a bunker, installing guns, rebuild the house with a secret passageway to his bunker. I made a bet with my friends so now tsuna is now a girl but still looks the same. There might be swearing who knows but no lemons