■ About This App
This app is an interactive drama.
Players simply progress through the story and make choices along the way.
Some choices are “premium choices” that unlock special scenes.
Make the right choices and reach a happy ending!

■Synopsis■
You live a peaceful life in a beautiful town bathed in an endless sunset, yet you can’t shake the feeling that something about this world is… wrong.

One day, you find yourself inside the forbidden clocktower at the town’s center. There, you meet an enigmatic young man who calls himself an “observer.” He tells you the world has been twisted by evil and entrusts you with a mysterious key said to restore it to its true form.

But the key’s power unexpectedly releases three striking demons. Are they truly the sinful beings everyone fears? What secrets hide behind their titles? Could this key unlock not only their bonds… but their hearts?

■Characters■

[Zarek]
“Listen well, human. You’re mine until you’ve paid your debt.”
Bold and arrogant, Zarek embodies the Sinner of Pride. His alpha-male attitude grates on you at first, but you soon see he’s more than just a royal pain. Will this proud demon let you stay by his side?

[Theo]
“I will never forgive you… Never!”
Stoic and reserved, Theo seems cold—until you see the quiet kindness beneath the surface. Like soft moonlight, his presence lights your darkest nights. But why does the Sinner of Wrath bear such an unforgiving heart?

[Noel]
“It’s cute how easily you react to my teasing. But if you never doubt others, you’ll lose yourself.”
Charming yet mischievous, Noel switches from playful to caring in a heartbeat. As the Sinner of Doubt, is his mistrust merely a shield… or something deeper? Only you can uncover the truth.