Gather the following:
– Egg
– Milk carton or any juice carton (cut open, washed well and dried)
– Chopstick (round one is ideal)
– Rubber bands
Step 1: Cut milk carton and fold it in half lengthwise.
This is all you need. (besides an egg) The milk carton is about 3″ X 8″.
Step 2: Make a hard boiled egg.
Step 3: While the egg is still warm, peel the egg and put the egg on the milk carton, place a chopstick on the center of the egg, and put rubber bands on the both ends.
If you don’t have a round chopstick maybe you can put a skewer inside a straw and use it. (If you use a disposable chopstick, the middle part of the heart will probably look funky.)
Make sure the egg is freshly boiled and warm. Otherwise the egg might break from the pressure.
It’s hard to see but you want the chopstick to dig into the egg.
Step 4: Leave it for about 10 minutes. (Keep the egg in the fridge if it’s summer time.)
Step 5: Take the chopstick off and cut the egg in half.
Hard boiled eggs are so soft, smooth and easily modified.
It’s cute as is.
But the heart shaped yolk makes it even more adorable! Also every pair is very unique, so no other pair is like it! Kind of romantic, isn’t it?
You can put them in the bento just as they are.
Or you can cut the bottom of the egg to make them stand.
This is great for beginners of both kyaraben makers and eaters. It doesn’t require any special technique or ingredients. Also I think it can be awesome finger food at a party. You don’t need a special mold so you can make a lot of them at the same time. Put seasoning on the top like salt, egg, ketchup, anything to dress them up or you can make deviled eggs with them. It’s easy, and a delicious way to tell someone how much you <3 them. 
Thanks to the Blog Anna the Red