Introducing the Rilakkuma “Rainy Day” Letter Set B! Featuring soft colors and adorable illustrations, it makes writing letters fun and heartwarming. The charming rainy-day design is perfect for messages to friends and family. Includes matching envelopes and letter paper, making it a great gift. Available at San-X’s official shop! Ideal for Rilakkuma fans and kawaii stationery lovers. Limited stock—get yours now!