An outfit that has gone viral from a user named Myako's tweet here, on December 4th, 2014. The turtleneckribbed sweater prominently features a center opening that reveals the cleavage of the user wearing it.
Artists eventually began throwing around the challenge to draw their waifu or husbando in the sweater.
Please note that sweaters with cleavage cutouts are nothing new. Only use this tag if the sweater the character is wearing is identical/adapted from the one in the tweet or if the artist tags it open-chest sweater/says it is related to the whole fad.
