In Episode 2 of "AI no Idenshi," "Growth Limit," the story mainly revolves around the interplay of three plotlines involving Jun, Kaoru, and MICHI.

The episode begins with Jun expressing his frustration over the limitations of his artificial body. As a track and field athlete, Jun competes against his friend Masa, but as they grow older, he falls further behind. Despite his serious efforts to improve his performance through rigorous training, Jun continues to be hindered by his physical constraints.

At the same time, a new character named Kaoru is introduced, visiting the clinic of Hikaru, the protagonist. The surprise in this scene comes when Kaoru asks Hikaru to examine her breasts, which raises eyebrows among the other clinic staff, such as Risa. During the examination, Kaoru invites Hikaru to join the "Surveillance Committee." This group, as we learn, is responsible for managing interactions between humans, humanoids, and an artificial intelligence named MICHI.

In another plotline, Jun gets involved in a volleyball accident where Masa sustains injuries. This incident proves to be a turning point for Jun, who pushes himself even harder in the subsequent track and field competition. Jun surpasses his personal best and wins the 100-meter race. Hikaru, observing this surprising development, remarks on the nature of effort in both humanoids and humans.

By the end of the episode, an important revelation comes to light. It turns out that MICHI, the AI interface, bears a striking resemblance to a younger Hikaru. This similarity hints at a deeper connection between Hikaru and MICHI, adding a new layer of intrigue to the plot.

Amid these events, Risa provides comedic relief to the intense proceedings. The episode ends with the viewer anticipating how the dynamics between Hikaru, the "Surveillance Committee," and MICHI will develop and what this means for the future progression of the story.