A strange new transfer student joins Akira Tsubaki's class - her name is Mikoto Urabe and she has the habit of hiding her face behind her hair and falling asleep during class. One afternoon, when Akira goes to fetch his bag from the classroom, he finds Mikoto sleeping alone at her desk. She wakes up and makes her exit, but leaves behind some of her own drool on the desk. Without thinking, Akira tastes the drool... and is surprised to find it has a sweet, delicious flavour! A few days later, and Akira mysteriously comes down with a high fever; he's confused as to what is wrong with him until Mikoto visits him and tells him he's addicted to her drool and is suffering from withdrawal symptoms. From now on, Akira will need a regular top-up of Mikoto's saliva or else he'll fall ill - but maybe this isn't such a terrible thing, considering that Akira is falling for Mikoto. However, will things go smoothly for Tsubaki, considering that Mikoto carries around scissors in her panties and has no qualms about using them on inanimate objects, when defensive or angry.
(Adapted from Anime Planet)