Akari and Azumi are lovers working as teachers at the same school. However, burdened by the pressure of others' judgment, Azumi tells Akari she wants to break up. In response, Akari forcefully spits her saliva into Azumi's mouth, refusing to accept the separation. Taken aback and confused, Azumi nonetheless feels an undeniable attraction toward that saliva. In this single moment, their twisted desires intersect, marking the beginning of a new relationship.