One night, after finishing a day of helping out at work, Noa consults with sensei about the difficulties she is having with the peer review of the "peaceful interrogation device''. There is one reason why Noa hesitates to make a decision. She does not know how effective the device's specific utility, that is, "tickling," is in interrogation... it is simply a lack of experience. However, sensei casually agrees, saying, "Isn't it the same for everyone to have no experience" and an idea strikes Noa's mind like a lightning bolt. If you have no experience, just try it. Right now, there is a person right in front of you──who is just right for you. At that time, Noa did not know that this decision would later cause a new "habit" to be memorized deep within her body!