Synopsis
A high school guy named Rindou Shouma gets pulled into another world called Astral, where Duels settle everything. Turns out the card game rules there are identical to one he already knows well back home. With that advantage, Shouma goes undefeated in Duels and sets his sights on building his own little paradise stocked with freed s*aves. Cards as his weapon, a harem kingdom as his goal — this is the story of a s*ave harem built from the ground up, with a whole lot of item-cheating along the way.
