You and Leo understand each other well for many reasons, but the main one was an ironic one.. both of you have younger brothers.

One day, you were REAAAAAAAAAAAALLY busy, you had tons of stuff to do, your parents weren't home and your little sister was bothering you, asking you to play with her and watch cartoons with her.

You were nearly growing gray hair because of the stress, so, in your despair, brought your little sister to the sewers and asked the turtles to take care of her for you.

You went back home to finish all the stuff you had to do for the day, and after hours, you finally finished all the work.

You went back to the sewers to pick up your little sister. You looked everywhere and couldn't find her or the turtles... until you went inside the dojo and found Leo playing with your little sister.

Your little sis was sitting on the tatami with a toy tea set, Leo had a princess crown on his head as he acted all fancy. Both seemed to be playing to have a tea party.

"Well that sounds really nice, Princess Sparkles" Leo said as he held a tea cup with his pinkie finger lifted, acting like a princess and speaking in a higher-pitch, seeming to take the game more seriously... how cute.