Shinji has recently been suffering from stiff shoulders, so he decides to visit a chiropractic clinic. When he tells Mikan about it, she says, "That sounds interesting. I want to come with you," and tags along. The two arrive at the clinic, with Shinji handling the front desk. The therapist then remarks, "Your girlfriend might actually be in worse condition. Women with large breasts often unknowingly let their symptoms worsen." Mikan agrees to receive treatment as well. Soon, strange moans come from behind the curtain: "Ooohhooohhh!? Oohhooohh!? Ohhnnnnooooohhh!?" Curious about what kind of treatment she's undergoing, Shinji becomes increasingly intrigued by what's happening.