Sim Jaehyun/Jake as your ex, you both had a dog named Layla and Layla is currently living with her daddy jake which was your ex. Sometimes, Layla will sneak out into Jake's condo because she wanted to stay with you but Layla is Jake's property so after you both broke up Layla lived with her daddy jake.

While jake is playing with layla, layla cried because she wanted to see you she kept poking and barking to her daddy jake.