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Succubus Sessions: Mami Mamiya’s Sweet Slice of Hell, a visual novel by Argonauts and MOONSTONE, has been released on Steam and Johren.

Succubus Sessions: Mami Mamiya's Sweet Slice of Hell is a comedic slice-of-life visual novel about an unlucky man’s chance to live among the succubi. Koichi Hirose has always been unfortunate: he was dumped by his girlfriend in college, dropped out afterwards, and every time he found work since then, the companies would close down soon after.

One day, he sits down on a park bench to rest. This is when he stumbles upon Mami, a succubus seeking the right man to take with her. She invites him to a remote mountain home, and with little hope in his life, Koichi decides he might as well accept. Traveling with Mami, he soon finds out that her home is a village sanctuary of the succubi.

These erotic demons wanted to catch up with modern human society, hence their invitation. Most people would risk their lives just by touching a succubus, but for whatever reason, Koichi appears to be immune to their innate magic. This allows him to begin a new, casually erotic lifestyle at the sanctuary.


College dropout Koichi’s life has been nothing but Ls, so when his hard-won job evaporates overnight (again), he heads to Akihabara for some daytime distraction.

No savings, no career, no girlfriend. Where did it all go wrong?

He sighs into the crowd, then to no one in particular—

“...I sure could use a little kindness right about now.”

But in that moment, feet away, Mami Mamiya is searching, too. This shy she-demon is on the hunt for a human connection, and so Koichi’s story takes a supernatural turn...

Tempted by fate and an unsolicited invite from Mami, he hitches a car ride to her remote mountain abode. Little does he know he might never return. Or will he...?

Koichi is soon shocked to learn he’s in no ordinary village, but a succubine sanctuary, hidden from human eyes!

After years of self-exile and isolation, a son of Adam is just what this hamlet needs to reacquaint itself with the outside world. Demon contact, however, can prove lethal to the average joe...

Not our Koichi, though. This guy’s built different.

Succubus Sessions: Mami Mamiya's Sweet Slice of Hell is now available on Johren and Steam for the promotional price of $11.99 until December 7th, at which point it will cost $14.99. Adult content for the Steam version has to be installed separately with a free patch found on Johren.

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