When a mysterious package is delivered to her, Gen accidentally awakens a beautiful, eager-to-please robot she names Ai.

Gen must teach a newly created robot how to live among humans. But when it begins asking questions about love, the lessons become far more complicated than either of them expected.

As Gen struggles to move on from her past, the robot becomes her greatest source of support. But as their bond deepens, new questions about love—and the true nature of the robots—begin to emerge.

When Gen's long-hidden secret comes to light, Ai becomes her greatest support. As Gen embraces her feelings, the two must face the challenges of a love between a human and a robot.

Ai begins to uncover the truth, while Gen risks everything to keep her safe. As the mystery surrounding the robots deepens, their bond is put to the test.

Gen dreams of a fresh start with Ai, but the arrival of a dangerous figure puts everything they have built at risk, forcing them to fight for their future together.

Irene returns and reveals that she is the person Gen has been searching for. With both Irene and Ai in love with Gen, she must finally choose between the woman from her past and the robot who has captured her heart.