In a futuristic society, Japan has implemented a complex system referred to as "The Red Threads of Science" to encourage successful marriages and combat increasingly low birthrates. Based on a compatibility calculation, young people at the age of 16 are assigned marriage partners by the government, with severe repercussions awaiting those who disobey the arrangement. For Yukari Nejima, a teen that considers himself average in every way, this system might be his best shot at living a fulfilling life. However, spurred by his infatuation for his classmate and long-time crush, Misaki Takasaki, Yukari defies the system and confesses his love. After some initial reluctance, Misaki reciprocates his feelings in a moment of passion. Unfortunately, before the two can further their relationship, Yukari receives his marriage notice. He is then thrown into a confusing web of love and lies when his less-than-thrilled assigned partner, Ririna Sanada, becomes fascinated with his illicit romance.
Episode 1
Yukari Nejima has been in love with Misaki Tazaki since grade school. He finally builds the confidence to confess his feelings, but nothing goes as planned.
Episode 2
Neji has now been appointed a wife by the government. When he meets his future wife Ririna, he’s surprised by her reaction when he reveals his secret.
Episode 3
Ririna invites Neji over to her house only to find Misaki already there. It’s apparent that Ririna has other plans for her assigned husband.
Episode 4
Love is complicated when you’re inside the Yukari system. Neji and Ririna must navigate the ministry together if they want their lie to come out intact.
Episode 5
The camping trip seems to be going well until all four them are forced to confront certain truths about their relationship.
Episode 6
Neji and Ririna have been assigned a special lecture, things take an awkward turn when they realize the nature of the lecture.
Episode 7
Ririna is confused about her feelings for Neji, especially after the special lecture. Meanwhile, Misaki questions her role in Neji and Ririna’s life.
Episode 8
Neji delves deeper into this friendship with Nisaki, and learns Misaki’s true feelings about his relationship with Ririna.
Episode 9
With the Romeo and Juliet play about to begin, Neji has a heart to heart with Nisaka about his feelings for the girls.
Episode 10
Shuu tries to shed light on Misaki’s situation to Ririna and Neji, she also reveals more about the notices and its origins.
Episode 11
Feelings start to be questioned when the gang ends up at a wedding, and Misaki can’t help but wish for a lie of her own.
Episode 12
Naji is forced to face his growing feelings for Ririna head on. With so much on the line, what will happen when these emotions finally start clashing?
