On March 26, 2026, IU shocked fans by dropping a brand-new post on her official Instagram, revealing the main teaser for the upcoming MBC drama '21segi Daegunbuin'.
In the clip, IU appears wearing ornate earrings, building a mysterious tension throughout. As the line "Will you marry me?"—a key moment in the drama—plays, the teaser escalates anticipation for what's to come.
Fans flooded the comments with messages like "We've missed you so much" and "I love you, IU," showing an explosive response.