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1. Align the top and bottom corners and fold the paper into a triangle.
2. Fold in half again horizontally.
3. Open the pouch-like area to make a square and fold up the paper.
4. Flip over and fold the top flap to the left along the dotted line.
5. Just as in Step 3, open and fold up the paper.
6. Fold along the dotted lines in line with the center crease, then unfold.
7. Also for the top triangle, make a crease along the dotted line, then unfold. Open and fold up the paper as shown in the diagram.
8. In the same way, open and fold up the opposite side.
9. Fold along the dotted lines in line with the center.
10. In the same way, fold the opposite side along the dotted lines in line with the center.
11. Lift the left and right sides of the lower pointed section and insert them into the top wing section. Meanwhile, draw in the pointed section's mountain-shaped area and refold it into a valley shape.
12. For the pointed section on the right side, refold the mountain-shaped area into a valley shape along the dotted line, pulling the tip out to the right.
13. Open the wings and align the shape in three dimensions.