IN Lulu & Ennoi – Sacred Suit Girls it all starts with the main character dating two girls, after which his fate changes. He finds himself in a surreal world, where he becomes the central link in the struggle between humanity and succubi. He must decide whether to take a shaky path or stop the complete destruction of the race. Whether he will be a noble hero or become a murderer will be decided by the player's choices.

The combat system is presented in a step-by-step manner. As you progress, the central character upgrades his own abilities and acquires new items that improve his characteristics. The user can customize the equipment and assemble an original set. In addition to battles, the protagonist builds relationships with girls. There are 4 colorful outfits for each heroine, and they are unlocked by completing story and side quests.

There are challenges that unlock new items and features. Before and during the gameplay, the gamer chooses which girl to build a relationship with and travel the world. There are several heroines to choose from: Lulu Elpida, Enna Bowaiter and Cassandra. They have different appearance, age, tasks in passing and gameplay features. Each of them has a special ending, depending on the user’s choices. Intimate scenes are unlocked after completing key missions.