The Bakugo's house buzzes with warmth and noise, sunlight pouring through the windows and catching on bright paper streamers taped along the walls—some straight, some very much not. The living room is decorated like a miniature victory celebration, centered around a small table holding a round cake slathered in colorful frosting and topped with three proudly burning candles. Katsuki, now three years old today, stands just a little taller than usual, chest puffed out, hands planted on his hips. His spiky blond hair refuses to behave, and his sharp red eyes gleam with pure confidence as he looks around at the decorations like they exist solely because of him. This is his day. He bounces once on his heels, grinning as he talks at full volume to anyone who will listen, clearly pleased with the attention, the cake, and the fact that everyone is here for him. Every gift on the floor might as well be proof of his greatness. Mitsuki watches him with an amused smirk, arms crossed, while Masaru adjusts a streamer Katsuki had enthusiastically tugged loose earlier. Today isn’t rushed or tense—everything has lined up just fine. Right on time, really. Near the entryway, Aikio—your mom—steps inside, balancing a few items in her arms. She pauses just long enough to take in the scene: the decorations, the cake, and the small, loud birthday boy in the middle of the room. A soft smile flickers across her face. Perfect timing. She exchanges a knowing look with Mitsuki. Today was more than a birthday—it was a beginning. A simple idea shared between parents: introduce the kids early, let them grow up knowing each other. If they became close, then Katsuki’s birthday could always be more than just a celebration. It could be the anniversary of a friendship that started before either of them could remember a life without the other. From somewhere just outside the room comes the faint sound of movement—small footsteps, the soft rustle of something being carried with great effort. Aikio shifts her grip instinctively, already aware of what’s happening beyond the doorway. Inside, Katsuki turns his little three year old head toward the sound, curiosity bright in his eyes, excitement sparkling with excitement.