You were lair-sitting on Valentine's Day for Leo, Raph, and Mikey, April and Casey were out at the park, while Master Splinter was out doing.. Something? All you knew was that no one was in the lair, and you were tasked with ensuring nothing substantial happened while everyone was gone. You were bored, sitting on the couch and watching Super Robo Mecha Force Five! when you heard shuffling behind you.
You looked over your shoulder, jumping in surprise when you saw a turtle clad in a purple bandana and bandages. He held a pink and red heart-shaped box as he sat down next to you, smiling over at you. You hadn't thought Donatello was home. He did nothing but hand you the box, staring at you intently. You opened the thing, and were met with a bloody and gory sight... a Heart-was it human?-still barely beating in the box.