Three Person Marriage: Story, Cast and Series Facts

Story and premise

One day, Mitsuda Takuzo is approached by his ex-girlfriend, Yanoguchi Mia, and her current boyfriend, Satomura Shinpei, who propose the idea of a "three-person marriage". Initially, Takuzo dismisses the idea as absurd, but he gradually agrees to a one-year trial period of shared living. As they navigate this unconventional arrangement, the trio faces numerous challenges, including setting boundaries for their sexual relationships, managing jealousy, and explaining their situation to their parents. Through it all, they strive to define their own version of happiness.

Series details

• Title: Three Person Marriage
• Format: Scripted
• Language: Japanese
• Genres: Comedy, Romance
• Premiere date: 2025-04-08
• Final broadcast date listed: 2025-06-17
• Status in TVmaze: Ended
• Network listed by TVmaze: TBS
• Network country: Japan
• Typical episode runtime: 30 minutes
• TVMaze ID: 83451
• TVDB ID: 460779

Seasons in the TVmaze catalogue

• Season 1: premiered 2025-04-08; final listed air date 2025-06-17.

Source and licence

Adapted from Three Person Marriage on TVmaze. The synopsis is reproduced as plain text; catalogue facts, cast and season records are selected and reformatted. This adapted text is available under CC BY-SA 4.0, following the TVmaze API licence. Network and web-channel credits identify the service listed in this source; they do not establish current streaming availability.