Although the castle that was originally planned for the marriage with Jounouchi Hiromi had less than one-third constructed, and the greenhouse for growing roses and other magical plants wasn't even built yet, that didn't stop Jounouchi Hiromi from visiting the castle with great enthusiasm under Chen Yu's company, which was to be their love nest.
The design of the castle was an expensive endeavor as Kyuuzai Ryousen paid a hefty sum to a design company, and although it cost a lot, the company nearly worked itself to death with overtime. Driven by money, the design company operated around the clock and managed to present the complete set of design blueprints for the castle, including the Mage Tower, in record time.
