No. According to comments from a developer, there are no official cheats built into the game. The only way to achieve "god mode" is through unofficial modifications.

If a modded damage value breaks a scripted event (for example, defeating a boss before they finish their dialogue), the game can permanently freeze. Alternative: Using In-Game Cheats Safely

Lust Academy Deluxe is a popular narrative-driven visual novel that combines wizarding school fantasy with adult dating simulation elements. While the game focuses heavily on story choices and relationship building, it also features active gameplay mechanics, including magic duels and turn-based combat encounters. As the story progresses into the v1.0.6 updates, these wizarding battles become significantly more challenging.

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: If you wish to return to the standard gameplay experience, you can usually deactivate God Mode by revisiting the mod or cheat menu and turning it off. Keep in mind that deactivating God Mode might make the game more challenging.

—fundamentally shift the gameplay experience of this narrative-driven RPG. The Mechanics of Empowerment In its original form, Lust Academy

Eliminating the need to level up stats or practice spells saves hours of gameplay time, making it ideal for casual players.