J's secret is that he has two entirely different personalities, but his rival Pup learns the truth. (Source: Thai = tunwalai.com || Translation = MyDramaList)
J-Day, J-Night is a groundbreaking Thai BL series that dives deep into the mind of J, a young man living with two entirely distinct personalities, each emerging at different times. By day, he is calm and collected, but by night, a bolder, more impulsive side takes over—a secret he has guarded fiercely. Everything unravels when his academic rival, Pup, accidentally discovers the truth. Instead of using this knowledge to destroy him, Pup finds himself irresistibly drawn into J’s fragmented world, sparking a tense, tender, and unpredictable romance. Filmed vertically to mirror the intimate, diary-like nature of J’s inner conflict, this short-length web series explores identity, acceptance, and the courage to love every version of someone. With 97 bite-sized episodes, J-Day, J-Night delivers an emotional rollercoaster that is as innovative in format as it is heartfelt in storytelling.