Sabrina: An in-training mage who specializes in Boundary Magic. The daughter of a noble family, she has both beauty and talent, and is a perfect being by her own account and everyone else's. But her armpits are extremely sensitive.Marilith: A skilled mage of the demon tribe and Sabrina's mentor. With her specialty spell "Hexarm," she grows six arms and puts them to use in both combat and tickling.On her travels, Sabrina meets Wanda, a woman with a deeply wounded heart. To heal her wounds, Sabrina uses the Boundary Magic "Parapsychogate" to enter her inner world and attempts to drive out the Trauma Demon.
But in the middle of the spell, an unexpected interruption occurs. Sabrina suffers under the unforeseen obstruction of having her armpits tickled. Amid it all, she is unwillingly reminded of painful memories from her past.
It all began during her training with her mentor Marilith, when she was told she had a fatal flaw as a Boundary Mage—