Plastic Sheet (or underlay sheet) is designed to let you write standing up by providing a sturdy surface underneath your page. You can also use it as a bookmark to instantly open to a certain page. The stiff material of the sheet can help you draw straight lines as if it were a ruler.
The theme of the 2025 edition is LOVE AND TRIP, featuring love songs, flowers, pigeons, and other motifs that remind us of love and peace.