The Ultimate Mystery: A Girlfriend
Mikoto Urabe is a new transfer student in Akira Tsubaki s high school class. One day, Akira happens to find Mikoto passed out asleep on her desk after classes have ended. He wakes her and tells her it s time to go home, and discovers that she has drooled on her desk. He spontaneously reaches out to touch and taste it and then things start getting really strange.
In this surprising and sweet twist on a high school romance story, boy meets girl and they learn about each other s inner life through their highly unusual bond, and Akira learns to...

The Mystery Deepens

As the school year progresses and the seasons change, Tsubaki and Urabe s unusual relationship continues to grow and change as the two learn new things both mysterious and mundane about each other. Then one day Tsubaki discovers a popular idol who bears an uncanny resemblance to his girlfriend "

Girlfriend: The Mystery Continues
Tsubaki s old crush, Hayakawa, had been surprisingly okay with his request to taste her drool. In a fit of conscience, Tsubaki stops himself in time, but that leaves Hayakawa wanting a chance to win back Tsubaki s attention, and so she cooks up a plot to bring both Tsubaki and Urabe to the Hoshinome Girls Academy seccentric culture festival "

Doppelgangers and Drool
The popular idol Momoka continues her mission to live the life of a normal high school girl by thrusting Urabe into the spotlight, which culminates in a moment of truth for Urabe and Tsubaki. But will Tsubaki be tempted away when the sloe-eyed beautySuwano makes a play for his affection?"

Drool-Worthy Denouement

As the school year wears on and the warmer months arrive, the boys enjoy the sight of the girls in their softball uniforms and swimsuits. Tsubaki invites Urabe to watch the fireworks from a place that holds special memories for him. Oka describes how she and Ueno first started dating, and Urabe comes clean to Tsubaki's sister about their relationship. When Urabe "sees" an important event from Tsubaki's past, she makes him an offer that will bind them together even more closely...

Movie-Making Madness
Tsubaki gets roped into acting a movie written, directed and produced by the VP of the film studies club, Matsuzawa. The script for the film turns out to be eerily similar to Tsubaki and Urabe's real-life relationship, with a twist ending that is surprisingly moving. After the film screens at the culture festival, Tsubaki worries that what used to be a unique ritual with Urabe will become something commonplace...