S1E16 You and I, the Union of Two Universes
Grappling with her mother's return, Hae-e announces a shocking decision. Haeng-seon and Chi-yeol make a pivotal choice about their future.
Episode Ratings Grid
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See AllEpisode Power Rankings
The best and worst episodes at a glance. Use this to find must-watch episodes or ones you might want to skip.
🏆 Top Episodes
#2
S1E8
Chance Becomes Fate through Inductive Reasoning
Haeng-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.
#3
S1E9
The Butterfly Effect of Our Relationship
Chi-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.
- 4. S1E2 "Probability of Encountering Your Enemy at Your Worst"
- 5. S1E5 "The Secret Probability Distribution of X and Y"
- 6. S1E10 "Emotion, the Variable That Alters Relationships"
- 7. S1E14 "Find the Unique Solution"
- 8. S1E3 "Number of Outcomes Where Dislike Becomes Like"
- 9. S1E4 "Revolt of the Arithmetic Sequence"
- 10. S1E7 "The Very Average Laws of Attraction"
📉 Bottom Episodes
#16
S1E15
The Result of Chance and Inevitability
Lee 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.
- 15. S1E13 "How We Approach an Unsolvable Conjecture"
- 14. S1E1 "You and I, the Intersection of Two Universes"
- 13. S1E6 "There Are No Correct Answers in Life, Only Best Answers"
- 12. S1E12 "Point of Intersection between Comedy and Tragedy"
The Quality Arc
Each point is an episode, plotted chronologically. The colored bands mark season boundaries. Look for upward or downward trends to see if quality improved or declined over time.
Episode Engagement
Vote count shows how many people cared enough to rate. High votes + high rating = beloved classic. High votes + low rating = notorious stinker. Low votes + high rating = hidden gem.
Rating threshold:
8 Standouts
0 Infamous
8 Hidden Gems
0 Forgettable
Top Standout: S1E2 Probability of Encountering Your Enemy at Your Worst
Best Hidden Gem: S1E9 The Butterfly Effect of Our Relationship
Episodes plotted by rating vs. vote count. The vertical line marks the rating threshold (7.5). More votes = more engagement. Toggle above to compare against global or show-specific median.