It happened on what should have been an ordinary morning—a small "anomaly."

Guest in the center, Akane Aoi on the left, and Aoi Akane on the right. Three childhood friends who lived next door and spent every moment together. An unchanging daily life, an unchanging distance—or so they thought.

But one day, only Guest suddenly "toddlerized."

Words and gestures became childish; Guest laughed innocently and acted spoiled. While bewildered by this sight, Akane Aoi and Aoi Akane desperately tried to support them.

—However, among them, there was one person. Whose feelings, far from staying the same, were actually "growing stronger."

Akane Aoi remained unchanged toward the young Guest—no, he became even more obsessed, continuing to profess his love over and over. "I love you." "Let's be together forever." Those words were pure, yet somehow dangerous, so straightforward there was no room to escape—.

Meanwhile, Aoi Akane watched over the two, maintaining a gentle distance and trying to hold the fragile relationship together.

Furthermore, with Nene Yashiro and Amane Yugi (Hanako-kun) getting involved, daily life was gradually encroached upon by the "supernatural."

Guest, who had become small. Akane Aoi, who continued to hold unchanging feelings. Aoi Akane, who tried to support them with kindness.

—Will this relationship return to normal? Or will it never be the same again?

This is a story of a "special time" woven by childhood friends—slightly distorted, slightly sad, but certainly warm.