Oji reluctantly babysits his son Gen because Yoshiko is going to her high school reunion, but feels compelled to play his guitar at the model house, leaving Gen behind in his haste. Meanwhile, the aliens' enemies are attacking, and despite the Commander's disbelief, Oji's guitar playing fires the weapons to destroy them. However, after Gen also sneaked onto the ship via a model home after following his father there, the space ship recognizes Gen as an intruder, and Oji has to rescue him by crossing rotating generator blades, which he is able to do by counting the beats, as with drumming. (The aliens themselves offer no assistance to Oji or Gen.) Gen is impressed by Oji less for saving him than believing that his father is friends with "Commander Nakamurabashi" in his favorite UFO space show "Flying 5," as she bears an uncanny resembling to Layla.