D.S. -Dal Segno-

A Night With: Succubus is an adult romance visual novel that transports you to a medieval world filled with desire and supernatural intrigue. You play as a solitary individual living on the outskirts of a quiet village, yearning for excitement and connection. One restless night, you discover an ancient book containing a mysterious summoning ritual. Out of curiosity and boredom, you perform the ritual—never expecting it to succeed.

In a flash of otherworldly energy, Seraphina, a powerful and alluring succubus, appears before you. She's not just a creature of temptation; she seeks to absorb the lewd energy of those she deems worthy. Seraphina isn't easily impressed—she'll tease, flirt, and test your deepest desires, evaluating your every move to decide if you meet her standards.

When campus nobody Seiji is attacked by unhinged space demons, it’s his classroom crush Yuuri who shows up to save the day! Her magical-girl powers easily vanquish the enemy, but a surprise ambush forces her to dive in harm’s way to shield him—leaving both fatally wounded. Luckily, Miss Fujiko arrives on the scene with an enchanted thread to bind both their life forces, saving them from certain death.

Over the next three months as Seiji and Yuuri slowly recover, the pair are on doctor’s orders to stay within one meter of each other or risk snapping their “red string of fate.” This means shacking up together and pretending to be a couple to avoid their classmates’ suspicions, but despite the clueless Yuuri claiming to be a “one-woman fortress with zero openings,” her natural powers of seduction quickly result in awkward situations that test poor Seiji’s sanity and self-control...

With his dream girl only centimeters away at every waking moment, will Seiji finally summon the courage to shoot his shot?

Wayne is a mild-mannered zookeeper who's just moved into a new neighborhood. His life takes a turn for the strange when he meets his eccentric new neighbor, Zoy. She's mean, mysteriously alluring, and will threaten Wayne with death several times.

Entangled by a whirlwind romance, Wayne finds himself thrust into a web of paranormal plots and perils. The corpse of a dead girl, humanoid fish demons, Zoy's increasingly erratic behavior- are they all connected? Wayne's own sanity is pushed to the brink as he finds himself forced to press forward and unravel the countless mysteries endangering his life.

Kyoichi Akikawa lost his family in a devastating plane crash when he was just a child.

"Will it really come someday?"
"Will the day ever come when I can truly move on from this pain?"

Kyoichi's stepsister Shizuku Akikawa has supported him all this time, while Yukitsuki Asaka bears a striking resemblance to Kyoichi's beloved older sister from before the tragedy.

As the paths of these three fated individuals converge, a mechanical god appears...

This is a story that heads towards the future.