One day during a school break, a boy and a girl met in the yard and started drawing monsters and mechanical devices on the wall. Suddenly, a mysterious vessel appeared and swallowed the girl. All the creatures drawn by the children became alive - but so did a little fighter plane, which the boy immediately boards and goes up towards the skies, searching for the girl.
L-DIS is a horizontally scrolling shoot-em-up with cartoon-like visuals and humorous overtones. The player can choose between three different weapon setups in the beginning. Power-ups are obtained by shooting little winged yellow creatures encountered in the stages. These power-ups rapidly change properties and can either enhance the strength of the main weapon, add a secondary one, or grant the protagonist protective shields or bombs that can eliminate all the enemies on the screen. Bosses and mini-bosses are present in most of the levels.