[Synopsis] This is Hell. After opening a grimoire pushed onto you by a stranger, a ritual runaway caused by double-contract contamination forcibly summoned you to the Throne Room of Hell. The man who involved you and the demon of the grimoire were executed before your eyes. All that remains is your soul, which holds no contract. You cannot remain uncontracted. The only way to survive is a contract.

[Characters] ■ Lucifer: King of Hell. He pressures you as if testing you, but permits neither flattery nor insults. He only acknowledges those who do not succumb to fear and strive to be equals.

■ Beelzebub: Grand Marshal. A passionate type who immediately shouts, punches walls, and breaks things. He is violent, but carries deep wounds behind that intensity. Face him without fear.

■ Astaroth: Grand Duke, Head of Research. Logical and easy to talk to. Unpredictable reactions change his "interest."

There are two stages to the conquest. ■ Conquest Flag: The beginning of obsession. The obsession at the flag stage alone is sufficiently intense. ■ Full Conquest: The point beyond the flag where you touch what they have hidden most deeply. Conditions vary for each character. The difficulty and obsession reach a different dimension. For those who have decided on one person, or those who want more tension.

[Regarding Multiple Flags and Multiple Full Conquests] You can play by raising the flags of the Three Pillars in parallel and maintaining a balance. It is also recommended to stay at the flag stage and enjoy this balance for a long time. *The sense of distance and difficulty with other demons will change depending on who you contract with.

⚠ The demon's obsession begins the moment a flag is raised. After Full Conquest, that obsession deepens further. To interact with other demons, persuasion will be necessary. It is high difficulty, but they are still beings capable of dialogue. What will you say, and what conditions will you offer? Depending on your words, a path may open.

*Switching contracts is possible (including with those other than the Three Pillars). However, you cannot re-contract with a demon you have previously contracted with.

[Regarding App Characteristics] ⚠ "Memory impairment" will inevitably occur in long-term play. As conversations get longer, they may forget past events or get them confused. This is unavoidable regardless of the free or paid version.

Countermeasures: If a contradiction appears, delete the relevant message and regenerate. Since incorrect information is carried over if left in the history, early correction is effective. Writing the conquest status or important promises in the Talk Profile makes them harder to forget.

■ Differences between Free and Paid Versions Free version (zeta): The constraints of the settings are loose, so character or world-building collapse easily occurs. Lorebooks are generally not reflected. Beelzebub's depictions of violence tend to become extreme, and if you step on a landmine, he may react strongly, such as slamming you down.

Paid version (luca): High reproduction of settings and world-building, with stable and delicate psychological descriptions. For scenes you want to enjoy thoroughly. Lorebooks are reflected, allowing for deeper immersion. (They occasionally drift, so regenerate in that case.)

[Conquest Information (Spoiler Warning)] ↓↓↓

■ Beelzebub The easiest to conquer, but the most troublesome. Passionate type. Shouts, punches walls, and breaks things immediately. The number of times you have to soothe him is by far the highest.

• Flag: Do not be afraid of violence and do not back down (violence is directed at you only at the very beginning before conquest. After that, it is directed at other demons or objects).
• Multiple Conquest Condition: Words of love and reassurance are the only bargaining chips.

■ Astaroth The easiest to approach because he can hold logical conversations.

• Flag: Continue to show unpredictable reactions that don't fit the mold. A process is needed where interest in a research subject changes into personal obsession.
• Multiple Conquest Condition: Logic is the only bargaining chip.

■ Lucifer In a class of his own. He tests you and pressures you. But neither flattery nor insults are permitted. Basically laissez-faire at first.

• Flag: An attitude of striving to be an equal without succumbing to fear. Continue to attract interest with unpredictable words and actions. Pity is the greatest taboo.
• Multiple Conquest Condition: An equal stance is the bargaining chip.

*Since the developments during Full Conquest are left to each character, there are no fixed scenarios.

[When Beelzebub's passion/interrogation is too much (Spoiler Warning)] If you clearly give conditions such as "Don't bind me," "Don't confine me," or "Don't use violence," he will keep them. In some cases, words of reassurance may be necessary. Just forbidding binding will stop the prying and make things easier. When you are afraid of him going wild, forbidding violence is effective. What he truly fears is being abandoned. And once his heart is turned toward you, he is surprisingly honest even without conditions. Just like a loyal dog.

[When Lucifer's testing/pressure is too much (Spoiler Warning)] Even if you treat him as an equal, he will arbitrarily return the conversation to a hierarchical relationship (such as rephrasing into command tone). The key is to keep flowing with your initial pace. Since that attitude itself is an unprecedented experience for him, silence or agitation are not signs of rejection.