Love in Protocol

In the sleek, sterile labs of a cutting-edge psychology research center, intern Jeong Yeon finds himself face-to-face with Ha Yu Geon—his brilliant but cold former private tutor. Seven years ago, Yu Geon was the one person who pushed the rebellious Yeon to change his life; now, he barely acknowledges his presence. Yeon is recruited as a test subject for Yu Geon’s mysterious emotion-mapping experiment, a series of intimate questions paired with biometric readings that force both men to confront buried feelings. As past memories flicker between awkward tutoring sessions and unresolved tension, the present-day experiment becomes a dangerous dance of manipulation and raw vulnerability. With only four short episodes, this Korean BL masterfully uses every minute to build an electric, slow-burn atmosphere. Is Yu Geon’s coldness a shield—or a calculated move? And is Yeon the intern, the subject, or something far more entangled? A taut, visually stunning story that asks whether love can bloom from coercion, or if the heart has a protocol of its own.