It is a role-playing game where Loki, the lower-class demon and the main character, aims for heaven with three of his friends in order to solve the mystery of the item "Pendulum" given to him by his uncle. If you save money during the adventure, you can exchange "engagement (contract)" with ancient demons with the power of the pendulum. The main characters can acquire various "skills" according to "form points (like experience points)" from the demons who have been engaged. By acquiring skills according to the purpose, it is possible to advance the battle with the enemy advantageously. In addition, the "navigation function" that plays an instructive role of the screen the player is looking at can also be activated with the push of a button, so even beginners in role-playing games can enjoy it with confidence!