Mysterious Girlfriend X

Urabe Mikoto, a strange new girl recently transfered into Tsubaki Akira class. She is assigned to a seat next to Tsubaki, who is designated by their homeroom adviser to be her guide. Tsubaki and the rest of the class soon discover that Urabe is an unusual girl. She makes no attempt to be sociable with her new classmates - choosing instead to sleep at her desk during break times. Leaving school late one afternoon, Tsubaki returns to the classroom for his bag and finds Urabe still asleep at her desk. Waking her up, he catches a glimpse of her pretty face (which is usually half-hidden by her bangs) before she leaves. Noticing some drool left by Urabe on her desk, he absentmindedly tastes it before realizing what he is doing, and hurries home in embarrassment. A few days later, he falls ill and collapses at school. Five days later, with his fever showing no signs of breaking, Urabe visits him at his house and asks him whether he tasted the drool on her desk. Upon receiving an admission of guilt, she has him lick her saliva off her finger which, to Tsubaki's amazement, causes his illness to subside immediately. Urabe explains to him that he was suffering from "love sickness", and that he experienced withdrawal symptoms from not receiving her saliva since the day he first tasted it.