✦A strange school romance uses a supernatural bond involving saliva to explore adolescent intimacy, boundaries, and communication through private rituals.
Synopsis
Mikoto Urabe is an antisocial transfer student known for sleeping at her desk and keeping classmates at a distance. Akira Tsubaki becomes fascinated by her, then discovers that sharing her saliva creates a peculiar physical bond. Urabe accepts this development with greater calm. Their relationship proceeds through private rules and very little conventional romance.
Tsubaki becomes curious about withdrawn transfer student Urabe and discovers an inexplicable connection through her saliva. She treats the bond as real and begins directing their unusual relationship. Familiar romantic gestures give way to strange physical signals that neither teenager can explain through ordinary courtship.
Mysterious Girlfriend X chooses saliva as the central image of first love and refuses to treat the idea as a disposable joke. Urabe is guarded, strange, and completely comfortable with rules Tsubaki does not understand. Their bond turns bodily weirdness into a language for awkward teenage trust. The commitment is unbelievable!
Many viewers will hear the word saliva and make a sensible exit. The series does not soften that fixation. Yet the commitment serves a purpose beyond shock. Urabe controls the terms of closeness, while Tsubaki must interpret a relationship that ignores familiar romantic signals. The bizarre premise keeps bodily boundaries impossible to overlook.