Few remember that Jong Suk once admitted IU "annoyed" him during their hosting days, or that both shared identical views on skipping dating to go straight to marriage. The clues were hiding in plain sight—from his concert appearances to her surprise performance at his brother's wedding that raised eyebrows months before their relationship went public. As details continue to emerge about their private Japan getaway and the meaningful support they've given each other through career challenges, one thing becomes clear—this relationship was years in the making. Despite occasional breakup rumors, their bond has only strengthened since that New Year's Day revelation. This is the complete timeline of Korea's most beloved couple and how they found their way to each other despite the spotlight and pressures of fame.