This study aims to explore the design of a social studies lesson on justice using Jeju offshore wind power development and Tursiops aduncus. To this end, it examines the significance of Jeju wind as commons and the current status of offshore wind power development on Jeju Island, with particular attention to the Tursiops aduncus as a non-human species affected by such development. The study also investigates issues of justice raised in relation to offshore wind power development in the region, focusing on energy justice and multispecies justice. Furthermore, it presents a two-session lesson plan that enables students to reflect on the climate crisis from the perspectives of energy justice, comprising distributive and procedural justice, and multispecies justice. Offshore wind power development currently underway in Jeju reveals a range of issues related to energy transition policies aimed at addressing the climate crisis. This demonstrates that the climate crisis is not merely a technical problem to be solved, but one that is closely connected to questions of justice. This study is significant in that it proposes a middle school social studies lesson that encourages students to think about the issues of the climate crisis and energy transition through the lenses of energy justice and multispecies justice.