You and I, the Intersection of Two UniversesAs competition in her class ramps up, Nam Hae-e anxiously awaits her math score. Choi Chi-yeol is embroiled in a scandal involving one of his students.
Probability of Encountering Your Enemy at Your Worst
E2
Probability of Encountering Your Enemy at Your WorstNam Haeng-seon attempts to register Hae-e into The Pride Academy. Desperate for Haeng-seon's food, Chi-yeol visits her store in a disguise.
Number of Outcomes Where Dislike Becomes Like
E3
Number of Outcomes Where Dislike Becomes LikeHaeng-seon begins fawning over Chi-yeol after discovering his true identity. A change in the Pride Academy's schedule creates a stir among the parents.
Revolt of the Arithmetic Sequence
E4
Revolt of the Arithmetic SequenceHaeng-seon gets a taste of the vicious politics among the academy's parents. She later goes to great lengths to make things right for Hae-e.
The Secret Probability Distribution of X and Y
E5
The Secret Probability Distribution of X and YHaeng-seon and Chi-yeol work out an arrangement for Hae-e's tutoring. A mysterious tragedy leaves the academy and its parents rattled.
There Are No Correct Answers in Life, Only Best Answers
E6
There Are No Correct Answers in Life, Only Best AnswersA painful past comes back to haunt Chi-yeol. Bang Su-a becomes suspicious of Hae-e after finding her secret worksheets on her desk.
The Very Average Laws of Attraction
E7
The Very Average Laws of AttractionHae-e ranks first in her class, causing drama among other parents. Chi-yeol and Haeng-seon grow closer as he spends more time with her family.
Chance Becomes Fate through Inductive Reasoning
E8
Chance Becomes Fate through Inductive ReasoningHaeng-seon realizes her own feelings after seeing Chi-yeol at the academy. Su-a connects the dots and begins to make sense of Hae-e's recent successes.
The Butterfly Effect of Our Relationship
E9
The Butterfly Effect of Our RelationshipChi-yeol and Haeng-seon deal with the fallout after their secret is discovered — forcing the two to confront what it means for them moving forward.
Emotion, the Variable That Alters Relationships
E10
Emotion, the Variable That Alters RelationshipsA public revelation leaves Haeng-seon and Chi-yeol's relationship in limbo. Meanwhile, Chi-yeol faces the repercussions of recent events.
The Functional Relationship of Our Love
E11
The Functional Relationship of Our LoveTired of her loved ones facing scrutiny, Hae-e makes a bold confession to the world. Haeng-seon and Chi-yeol navigate their road ahead post-scandal.
Point of Intersection between Comedy and Tragedy
E12
Point of Intersection between Comedy and TragedyA shocking arrest leaves the academy's parents — and Hae-e — concerned. Haeng-seon and Chi-yeol maneuver the days after their first fight.
How We Approach an Unsolvable Conjecture
E13
How We Approach an Unsolvable ConjectureHae-e attempts to get a hold of Lee Sun-jae after being put in a difficult position at school. Haeng-seon catches Ji Dong-hui in a hostile moment.
Find the Unique Solution
E14
Find the Unique SolutionNews about Hae-e leaves those around her feeling rattled. Haeng-seon begins to suspect something's off. Chi-yeol confronts Dong-hui about his behavior.
The Result of Chance and Inevitability
E15
The Result of Chance and InevitabilityLee Sun-jae's confession ignites a scandal at the school. Chi-yeol attempts to put an end to Dong-hui's scheme before it's too late.
You and I, the Union of Two Universes
E16
You and I, the Union of Two UniversesGrappling with her mother's return, Hae-e announces a shocking decision. Haeng-seon and Chi-yeol make a pivotal choice about their future.
