After reading and getting hooked on The Elegant Duke's teaching method I really want to find more manga/manhwa/manhua about the life of the upper classes and their lifestyles.

I really loved for the artist of Elegant Duke went into so much details about their daily (lavish) lives (the watches, the interior design, the food, the clothes and shoes, whauza!), and it's so interesting to see how this translates in a medium like manga. Now I would like more of the same!

Any recommendations about similar manga, featuring the luxury lifestyle of the upper classes? I tried finding it among the typical dramatic manhua with rich families, but most don't really go into their daily life detail and have shallow story-lines that hardly tickle my fancy.

Thanks in advance!