Overview:

Hachi Eirin, the doctor of E*tei who lives in the phantom village.
She is a housemate of the same E*tei and the owner of the lost bamboo grove.
She receives the mysterious egg Ino Tewi brought back from the bamboo forest.
She was told it was a rare beauty potion and was given it,
She is the reason why she likes pranks.
Having a bad feeling, Eirin tries to dispose of the egg, but…