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E1 Don't Look at Me Like That
As an intern at a cognitive science institute, Jeong-yeon meets Yu-geon, his former high school tutor.
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E2 "Do you still see me as a child?"
Participating in a VR test for an emotional reaction experiment, Jeong-yeon faces his own feelings through questions.
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E3 "You don't have to feel guilty, professor"
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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E4 "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.