I'm going to attempt to do the thirty-day challenge for GerIta (One of my OTPs) Disclaimer: I do not own Hetalia or any of its characters.
Day one: Holding Hands
Day two: Cuddling somewhere
Day three: Gaming/ watching a movie
Day four: On a date
Day five: Kissing
Day six: Wearing each others clothing
Day seven: Cosplaying
Day eight: Shopping
Day nine: Hanging out with friends
Day ten: Wearing Animal ears
Day eleven: Wearing Kigurumis
Day twelve: Making out
Day thirteen: Eating Ice-cream
Day fourteen: Genderswapped
Day fifteen: In a different clothing style
Day sixteen: During their morning Ritual(s)
Day Seventeen: Spooning
Day eighteen: Doing something together
Day nineteen: In formal wear
Day twenty: Dancing
Day twenty-one: Cooking/baking
Day twenty-two: In Battle, side-by-side
Day twenty-three: Arguing
Day twenty-four: Making up afterwards
Day twenty-five: Gazing into each others eyes
Day twenty-six: Getting Married
Day twenty-seven: On one of their birthdays
Day twenty-eight: Doing something ridiculous
Day twenty-nine: Doing something sweet
Day thirty: Doing something hot