This is a Letter writing set "Agapanthus" by Tegamiya (matsumi yoshimura), who designs stationery in Japan.
The calm atmosphere is perfect for slowly writing a thoughtful letter.
The reverse side of the letterhead is plain and has a slippery texture.
The envelopes are tracing paper, so you can enjoy the translucent feeling.
Tegamiya is the artist who inspired me to start my own store, and I started this store because I wanted to sell her products.

Letterhead: 8 sheets, W21 x H15 cm
Envelopes: 3 sheets, W10 x H15cm
Stickers: 3 sheets