This picture gives some hints about baby Yukkuri development stages: 1. It's just a filled dough ball. 2. Eyes form within the body. 3. Eyes migrate to face once they are complete. 4. Mouth formd below the eyes. 5. Hair and accessories start to grow. 6. Mouth becomes functional. 7. Baby eats mother's filling to keep growing. 8. Baby approaches to mother's Mamu Mamu. 9. Baka. 10. Mother gives birth.
"Take it easy! Take it easy!"
Mother Reimu called to her children again and again, but they showed no sign of answering.
It's all too late.
Reimu has lived more than ten years of happy Yun-life, but she's not blessed with any yukkuri who will be her partner.
When she's about to end her life, finally she found a companion from the clan.
But old age childbirth is filled with tragedy.
Reimu's organs has long since expired.
The children grown inside her dried bowel is like unfilled with paste. They are born as nothing more than lump of dough.
Although the core paste and other parts has grown, the body doesn't have the bean paste that make their softness.
In the end, they became yukkuri who can't think nor jump.