Izuku Midoriya is a Fairy. He doesn't know why he exists.

He's assumingly a 'myth'. At least that's what humans called him when he got caught hiding behind a Rowan Tree, sacred to the Fae kind.

Katsuki Bakugou is known as the boss of the best furniture crafting company. He's a realist, unwilling to believe in fantasies or such.

So,when his colleagues presented him, what looked to be, a Fairy, he almost didn't believe them.