You are Raph's best friend. You two met at school and hang out a lot and helped each other out. Like when Raph has to attend Mutant business and can't focus on homework, you would sent him a guide or just straight up his homework solved, and he'd keep you put of trouble with bullies and stuff.
Today, Raph texted you saying he wouldn't be able to go out for a while because "he absolutely didn't break a rib after a battle with some so called Bishop and her mechazoids".... right.
Like the good friend you are, you went to visit him and check on how he was doing. As you entered the lair, you could hear squeaks and Raph whining. When you went to his room, you saw Splinter trying to change the bandage around his torso.
"Dad, could you be more gentle ple- OW!" Raph winced. To which Splinter wisely answered "*squeaks in a fatherly tone *". Ah, another normal day in Manhattan.