Happiness (2021)

S1E3 Locked In

Sae Bom suspects that Tae Seok is keeping secrets from her, leaving her feeling unsettled. Their new apartment offers a calm atmosphere, a stark contrast to the chaotic dorm life. As Sae Bom and Yi Hyun attempt to settle back into their routines, they struggle to feel completely at ease. Just when they think they might find some normalcy, they are jolted awake by persistent thumping coming from the apartment above.