Yuusha to Wagahai no Mujintou Hyouryuuki
勇者と我輩の無人島漂流記
The Great Demon King Veit and hero Keel were engaged in their final confrontation at the Demon King's Castle when a cliff collapse stranded them on a deserted island. Despite being enemies, they must cooperate to find a way off. The story explores whether the two can form a bond under these circumstances.