Crash Course In Romance 1x5 The Secret Probability Distribution of X and Y Season 1 Season 1 16 Episodes Haeng-seon and Chi-yeol work out an arrangement for Hae-e's tutoring. A mysterious tragedy leaves the academy and its parents rattled. 1x1 - You and I, the Intersection of Two Universes 1x2 - Probability of Encountering Your Enemy at Your Worst 1x3 - Number of Outcomes Where Dislike Becomes Like 1x4 - Revolt of the Arithmetic Sequence 1x5 - The Secret Probability Distribution of X and Y 1x6 - There Are No Correct Answers in Life, Only Best Answers 1x7 - The Very Average Laws of Attraction 1x8 - Chance Becomes Fate through Inductive Reasoning 1x9 - The Butterfly Effect of Our Relationship 1x10 - Emotion, the Variable That Alters Relationships 1x11 - The Functional Relationship of Our Love 1x12 - Point of Intersection between Comedy and Tragedy 1x13 - How We Approach an Unsolvable Conjecture 1x14 - Find the Unique Solution 1x15 - The Result of Chance and Inevitability 1x16 - You and I, the Union of Two Universes