"You don't have to feel guilty, professor"

Love In Protocol poster
Love In Protocol
31st January 2026 9 mins Season 1 Episode 3

For the first time late, Jeong-yeon appears in the laboratory injured as in childhood, and Yugeon reacts angrily when he sees him.

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"That's why I came back, growing up" still
Season 1 · Episode 4

"That's why I came back, growing up"

As the final experiment finally begins, Yu-geon and Jeong-yeon's hidden feelings begin to reveal themselves.
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01 Lee Sang-min profile Lee Sang-minas Min Jeong-yeon 02 Jeong Jae Jong profile Jeong Jae Jongas Ha Yu-geon 03 Kwak Geon-hee profile Kwak Geon-heeas Choi Myeong-jin
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