All 5 Twenty-Five Twenty-One Filming Locations (2022)
스물다섯 스물하나 · tvN / Netflix · starring Kim Tae-ri, Nam Joo-hyuk
· in Rest of Korea, Gyeonggi & Incheon, Gangwon
✓ Verified July 2026
Photo: Mobius6 · CC BY-SA 4.0 via Wikimedia Commons
Most of Hee-do and Yi-jin's world is one walkable Jeonju neighborhood — the tunnel, the house and the comic shop sit minutes apart around the Hanok Village.
1Hanbyeok Tunnel
The 60m railway tunnel where Hee-do and Yi-jin confess — and where they break up in the finale.
💡 Far emptier than Gyeongpo Beach, and the Heonhwa-ro coastal road next to it is one of Korea's most scenic drives.
The Jeonju pilgrimage
Three of the five locations cluster around Jeonju Hanok Village, Korea’s best-known traditional district — which means the drama trip doubles as the classic Jeonju day: hanok lanes, bibimbap (this is its birthplace), and the tunnel-house-comic-shop loop on foot. The school scenes used a working school in Nonsan (not visitable), and Yi-jin’s rooftop room is a private home — street view only.
Combining trips
The Suwon fortress stop shares a neighborhood with Lovely Runner and Extraordinary Attorney Woo locations, and Geumjin Beach extends the standard Gangneung KTX day (Goblin’s breakwater, the BTS bus stop) 30 minutes further south.