My Girlfriend's Friend: Story, Cast and Series Facts

Story and premise

Takeru Hidaka is an ambitious high school student aiming for medical school. He has just started dating his first girlfriend, Kaori Koga, and to everyone else, their relationship seems perfectly harmonious. However, that peace is threatened when Kaori's best friend, Tomoko Yoshioka, begins to flirt with and seduce Takeru. Caught between loyalty to his girlfriend and Tomoko's advances, Takeru falls into a double life and a complicated affair. Now, he must navigate a web of lies that puts both his academic future and his emotional connections at risk, all while the constant threat of his secret being exposed looms over him.

Series details

• Title: My Girlfriend's Friend
• Format: Animation
• Language: Japanese
• Genres: Drama, Romance
• Premiere date: 2026-10-04
• Status in TVmaze: Running
• Network listed by TVmaze: Tokyo MX
• Network country: Japan
• Typical episode runtime: 30 minutes
• TVMaze ID: 94680
• TVDB ID: 477658

Cast and credited roles

• Ruga Nagaike — Takeru Hidaka
• Sayaka Hanemurasaki — Kaori Furukawa
• Miki Hase — Tomoko Yoshioka
• Riho Sugiyama — Miyuki
• Suzuka Yuzuki — Kaori's mother

Seasons in the TVmaze catalogue

• Season 1: premiered 2026-10-04; final listed air date 2026-10-11.

Source and licence

Adapted from My Girlfriend's Friend 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.