New with tags MICHIKO LONDON KOSHINO 4-piece suit, size 150, formal

This is a new set with tags, purchased on Mercari Shops for 7900 yen.
I bought it for my graduation ceremony, but the waist was too tight, so I had to buy a size up and no longer need this one.
Although it's set to ship in 2-3 days, I will ship this out immediately.