The poster depicts Kyojuro Rengoku and Tanjiro Kamado standing together on the roof of the Mugen Train, with tears streaming down Tanjiro's face as he bids farewell to the Flame Hashira. The train is surrounded by flames, symbolizing Rengoku's fiery spirit and his commitment to protecting humanity from the demons. In the background, the rising sun shines through the clouds, representing hope and the dawn of a new era.