This is a Letter writing set "Transparent connected letterhead -wildflowers" by Kisetsu no Tegamiya (matsumi yoshimura), who designs stationery in Japan.
Kisetsu no Tegamiya (matsumi yoshimura) is the artist who inspired me to start my own store, and I started this store because I wanted to sell her products.
The warm, gentle, hand-drawn illustrations comfortably convey the seasons and landscapes of Japan.

This is a very mysterious letter set.
The first sheet has a thin sheet of tracing paper attached to it, and when you turn the first sheet over, you will find a gray rough paper called "Tablo" as the letter paper.
The letter paper for the second sheet has double-sided tape on the top, so peel off the double-sided tape and stick it to the back of the first sheet, matching the top.
The result is a mysterious letterhead that looks like a notebook.
The envelopes are made of thick tracing paper, so they are transparent.

-A5 Letterhead (with tracing paper)
2 sheets of two different designs. 4 sheets in total.
-A5 Letterhead (with double-sided tape)
2 sheets of two different designs. 4 sheets in total.
-Envelopes 4 sheets.