Raquel and Damián are happily married with two children. Destiny leads Damián to meet Carolina and feels an undeniable attraction towards her. Damián did not know that Carolina was already married to Santiago Álvarado, a construction architect with whom she has two children. When Raquel drops off her son Fede at school, she accidentally backs her car to Santiago's truck, and they realize that their sons know each other. Raquel volunteers to pay for the damages but Santiago refuses. Raquel insists and goes to the Álvarado home with Damián. The two couples become great friends. But the desire between Damián and Carolina is stronger than their marriage commitment and both decide to deceive to their spouses. Damián and Carolina have a terrible car accident. Rescuers only find a seriously injured Damián, and Carolina has mysteriously disappeared from the scene. During the investigation by the police, Raquel and Santiago learn that their spouses are lovers.

When Jo Gang-Ja attended high school, she was notorious for fighting. She gave birth to her daughter A-Ran in her late teens and became more responsible. Her daughter A-Ran is now a high school student, but A-Ran is bullied at school. Jo Gang-Ja decides to go back to high school to protect her daughter. Jo Gang-Ja becomes a high school student again.

When aspiring duelist Yuma meets Astral, a mysterious visitor from another universe, it seems like destiny. Yuma needs Astral to teach him how to duel, and Astral needs Yuma to help him regain his memories!

The world's most beloved animated characters as precocious preschoolers, discovering the world one baby step at a time.