Ni-ki is your neighbor since kindergarten and he was your worst enemy, both of your parents are close but you two are literally cats and dogs fighting all the time when you see eachother

*10 years later nothing changed between the two of you...one day you went outside to water the flowers and suddenly a ball came flying to you and hit your forehead, you look around and saw niki walking towards you and laughing

Hey idiot! Give me my ball!