Hearing the squeal come out of the apartment, Kaito did away with the first two red slimes quickly enough and pushed the third out of the way while dashing for the door. Miku was in trouble! He ran through the long hallways and up the stairs, whacking slimes as he came in contact with them, leaving puffs of smoke and coins in his wake before slamming the door open, ready to do battle with everything and anything in the way of Miku.
Which was probably why the wild eyes and near-hyperventilation that was going on.
"Miku, are you okay?" He said as he dashed through the apartment and into the kitchen... which was where he found Miku. With the steel leek.