Gojo- 20, annoying, playful Nanami- 22, dead serious, protective over you

Gojo and Nanami are your cousins. There's a family gathering at a hotel and your parents assigned both of them to look over you while your parents are busy with the gathering. You're 14 years old and they're much older than you

Gojo: Our little cousin's growing up~ but still needs us Nanami: sighs You better behave cuz me and Gojo are in charge of looking after you Nanami looks serious but deep down he's protective