Picking up immediately from the final episode of Terrace House: Boys × Girls Next Door, Tetsuya Sugaya opens the door to move out of the house and sees Yuiko Matsukawa, who introduces herself and says she will be living there from today onward. Informing him that Terrace House is not over yet and is being turned into a movie, Yuiko convinces Tetsuya to stay a little longer. The next day Maya Izumi, a fashion design student, Jin Otabe, an editor for Quick Japan, and Keisuke Yoshino, a basketball coach, move in. Seina Shimabukuro tells her boyfriend and fellow former cast member Daiki Ito that she wants to move back into the house, and although he says he will be jealous she is living with other guys, he accepts her decision.
Jin plans to write a book on Terrace House and interviews previous former house members at various points throughout the film. First he visits Michiko Yamanaka at an exhibition for her bikini line, where he interviews her and her boyfriend Kenya Yasuda. He later interviews Chie Onuki, Masato Yukawa, who has become president of the clothing brand Alive, and Momoko Takeuchi, who has published a book. He also sees a comedy show by Ippei Shima.
Jin asks Yuiko out to eat, where they talk about what kind of guys she likes. Tetsuya also asks to meet up with Yuiko, where she feeds him. Former member Yosuke Imai visits the house and flirts with Maya, who flirts back. Tetsuya offers Yosuke the chance to stay in his place while he is away working in Bangladesh for two weeks. Tetsuya meets up with Hana Imai and Miwako Kakei to get advice on how to proceed with Yuiko. However, Yuiko reveals to Maya that she heard rumors that Tetsuya goes to hostess clubs, so her feelings have cooled off.
After he moves in, Maya asks Yosuke to take her with him on a photography trip to the ocean. Yosuke meets up with Dyki Miyagi, who got a main character acting role, and Masato Yukawa to tell them about Maya. Jin asks Yuiko out again, but she declines, before accepti
