IU and her brother's texts have been revealed, drawing attention. The texts, posted by IU, have come up on various online community bulletin boards, causing laughter amongst netizens.

In the texts, IU continuously sends "Hey," "Heyheyhey," to her brother. But his attitude is that of unconcern, either giving a short reply or only replying after a long time has passed.

Finally getting pissed by this, IU takes measures into her own hands and texts, "If you don't reply I'm going to cut off your alliance." Only the does her brother reply, "Why."

Netizens responded by saying, "He must think IU is annoying," "IU seems to care about her brother a lot," "Typical brother and sister relationship," "It must be frustrating for the sister," etc.