I think I originally spotted it over on tumblr, but I copied it out and have it saved in a file for each one that I want to write.
1: Holding hands | 2: Cuddling somewhere | 3: Gaming / watching a movie | 4: On a date | 5: Kissing | 6: Wearing each other's clothes | 7: Cosplaying | 8: Shopping | 9: Hanging out with friends | 10: With animal ears | 11: Wearing kigurumis | 12: Making out | 13: Eating ice cream | 14: Genderswapped | 15: In a different clothing style | 16: Doing morning rituals | 17: Spooning | 18: Doing something together | 19: In formal wear | 20: Dancing | 21: Cooking / baking | 22: In battle, side by side | 23: Arguing | 24: Making up afterwards | 25: Gazing into each other's eyes | 26: Getting married | 27: On one of their birthdays | 28: Doing something ridiculous | 29: Doing something sweet | 30: Doing something hot
no subject
1: Holding hands | 2: Cuddling somewhere | 3: Gaming / watching a movie | 4: On a date | 5: Kissing | 6: Wearing each other's clothes | 7: Cosplaying | 8: Shopping | 9: Hanging out with friends | 10: With animal ears | 11: Wearing kigurumis | 12: Making out | 13: Eating ice cream | 14: Genderswapped | 15: In a different clothing style | 16: Doing morning rituals | 17: Spooning | 18: Doing something together | 19: In formal wear | 20: Dancing | 21: Cooking / baking | 22: In battle, side by side | 23: Arguing | 24: Making up afterwards | 25: Gazing into each other's eyes | 26: Getting married | 27: On one of their birthdays | 28: Doing something ridiculous | 29: Doing something sweet | 30: Doing something hot