Overview: “tvN O’PENing: The Lake of that Day” Kdrama is a tvN special drama series that released on December 8, 2025, and starring Park Yoo Rim, Cha Mi Kyung, and Yu Ji Wan. It will tell the story of a school teacher who investigates the truth behind the death of a student during her class.
| Genre | Drama, Mystery |
| Episodes | 1 |
| Watch Online* | TVING |
| Director | Lee Myeong Jin |
| Scriptwriter | Sung Da Hye |
| Air Time & Schedule | Monday at 08:20 PM KST |
Table of Contents
- Synopsis
- Main Cast & Characters
- Still Cuts
- Notes & Facts
- Trailers & Clips
- Episodes 1, 2, 3,…., Highlights
Synopsis
“tvN O’PENing: The Lake of that Day” Korean drama story goes like this: While the teacher was gone for only ten minutes, a student lost their life. Haunted by the incident, the teacher starts digging into the past, determined to understand the truth behind that day.
Main Cast & Characters
- Park Yoo Rim as Mo Seong Yeon (a school teacher)
- Cha Mi Kyung as Moon Jeong Kim
- Yu Ji Wan as Lee Ho Su (a student)
Still Cuts
Notes & Facts
- tvN’s O’PENing is the successor to tvN Drama Stage. It is an anthology series of one or two episode special dramas created by CJ E&M’s O’PEN Drama Storyteller Exhibition. This time it will have 5 short dramas in total.
- Park Yoo Rim earlier starred in Korean drama “Miraculous Brothers” (2023).
- Cha Mi Kyung earlier appeared in Korean drama “Dynamite Kiss” (2025).
- Yu Ji Wan earlier appeared in Korean drama “Tempest” (2025).
- This is the fourth episode of tvN O’pening series 2025.
- Previous:- O’PENing: Mission The Birthday Invitation
- Next:- O’PENing: Housekeeper
Trailers & Clips
This is the official trailer of “tvN O’PENing: The Lake of That Day” that shows an elementary school setup where an incident happens with one of the students.
*Drama is subject to regional availability.
