This report examines the trends in overall happiness scores over the past four years. The data reveals that overall happiness score showed a reverse trend after three-year persistent decline, from 6.83 (2020), 6.56 (2021), 6.46 (2022), and 6.56 (2023). The trend is similar in other happiness domains, including life evaluation and Eudemonia. The gap in happiness between socio-economically vulnerable groups and others seems to be continuously widening, suggesting an increase in happiness inequality. It is clear that further research and policy interventions are needed to enhance the average happiness of Koreans and narrow the happiness gap.