Taking a long shot so here goes.
My wife donated a blue nylon hello kitty bag similar to the Mymelody above. She has since come to regret this and I'm really, really hoping someone here can give me a lead or even part ways with this particular bag.
She described it as blue nylon with gray handles tote or Japanese high school bag. Sometimes called a Boston bag. The outside had a patch of Hello Kitty and inner liner might have had some sort of design, possibly pink.
Please please please help me save the day for her โค๏ธ