Reply High School Episode 4

The long-awaited Idol Exercise presentations finally unfold, as the three classes showcase the energetic, inventive, and laughter-filled performances they've worked so hard to prepare. With the stage excitement behind them, a brand-new Day 4 begins at WOOJEONG HIGH. Three special lecturers arrive to lead lessons in Economics, Fandom, and Variety Shows. Which classes will the SMTR25 members choose, and what new insights will they gain?