The episode begins in December 1999 at Alcohol Soft, where the team celebrates the completion of their ambitious game "The Last Waltz." The team members, including Konoha, Meiko, Kyonshi, Kikiko, Lalako, and others, express their excitement and disbelief at finishing the game, especially given its extensive content and the short development time of five months.

Konoha has an open conversation with Meiko, who shares her initial reservations about working on bishojo games and how her perspective has changed. Meiko now wants to share her game with the world and overcome the shame of the past. Konoha enthusiastically supports Meiko's vision and dreams of worldwide recognition for their game, similar to the success of "Nekopara."

The team decides to visit the newly constructed Dejiko building in Akihabara, which symbolizes the rise of bishojo culture. There, they meet Toya, who tells them about his plans to start a new game development company and invites Konoha to join him. Konoha hesitates, as she is uncertain about her future due to her time-travel experiences.

Meanwhile, Mamoru discovers a game called "Welcome to the Game House" by Echosoft. Konoha returns to the office and brings Mamoru food from the party. She thanks Mamoru for his role in developing the game, but he downplays his contribution.

Konoha worries that she might disappear again. Mamoru suggests that her desire to develop the game might anchor her in the present. Despite Mamoru's indifferent reaction, Konoha declares her love for the team and the joy she found in developing the game.

As she leaves the office, Konoha notices something unusual in the sky. Suddenly, she is alone and realizes she has time-traveled once again. Confused and disoriented, Konoha finds herself in a changed Akihabara. She recognizes the Radio Kaikan building, one of the few remnants of the Akihabara she knows.

A construction supervisor confronts her, but Mamoru, now an elderly man, intervenes, and Konoha is shocked by his aged appearance.