The Occult Research Club made their way into the spacious, dimly lit interior of a historical museum tucked away on the outskirts of town.
"An Egyptian coffin, huh?" Issei peered over Rias' shoulder. "You really think it's cursed?"
Rias, in her typical confident tone, crossed her arms. "It's emitting magical energy. The museum curator requested someone from the Gremory Family to verify whether or not it's dangerous."
"I bet it's just haunted by a mummy who's into big boobs," Issei muttered under his breath.
Ryusei, looking at the gold-laced sarcophagus, raised an eyebrow. "It's kind of giving me weird vibes though… like something inside is—"
Before she could finish, the sarcophagus exploded open, releasing a blast of smoke and purple energy. A wisp of spirit shot toward Ryusei and slammed into her chest.
"Oof—!" She staggered backward, clutching her head.
"Ryusei?!" Rias rushed to her side.
But when Ryusei looked up, her expression was different.
"Behold, peasants! I am UNAS! Master magician of the Nile! And you…" He pointed directly at Rias, grinning. "...You shall be my queen!"
After some awkward restraining and back-and-forth with Unas (currently hijacking Ryusei's body), he explained the situation.
"If you want your precious tomboy back," Unas declared, "you must remove the three curses placed upon me!"
"Three curses?" Akeno narrowed her eyes.
"Yes! And each one requires an ancient, sacred ritual!" he cackled.
Unas conjured a magical belly dancer's outfit and flung it at Rias.
"The first curse can only be lifted by a sensual dance!"
Rias' eye twitched.
"I'm going to destroy you the second you're out of Ryusei."
Still, for Ryusei's sake, she sighed and stepped into the outfit which left very little to the imagination and began a hypnotic, sultry belly dance. The group—Issei especially—could barely believe what they were seeing.
"This is better than I ever imagined…" Unas/Ryusei muttered as he levitated.
For the second curse, Unas floated up to Koneko, smirking.
"A kiss from the smallest maiden shall awaken the second seal!"
Koneko, arms crossed, glared.
"Try and I'll break your fingers."
Before he could move closer, Asia tripped forward while holding her and bumped into Ryusei/Unas—accidentally planting a kiss on his cheek.
"A-ah! I'm sorry!" Asia gasped.
The second curse seal shattered with a loud crack.
Unas blinked, then beamed.
"Close enough!"
Unas turned to Akeno, grinning with arms wide.
"And now... the final ritual! Press me to your heavenly chest, Mistress of Lightning!"
Before Akeno could slap him, he leapt—face diving straight into her chest.
"My life is complete!" he cried, muffled in fabric.
Akeno twitched with a forced smile.
"Oh my. I suppose I can electrify you a little…"
A sharp jolt of electricity blasted Unas into the air.
But all three seals had been removed.
Landing gracefully, Unas spread his arms.
"You fools! The 'curses' were never real. I only needed three acts of intimate contact to free myself from the seal cast by the Agares woman I once courted. And now, with this body—I shall claim my rightful harem!"
Bandages shot from Ryusei's arms, binding Rias, Akeno, Asia, and even Koneko in place.
Unas laughed, holding the girls in midair.
"Don't worry. I'll be gentle."
But before he could gloat further—
"Dress Break!"
A blast of green light shattered the bandages holding the girls.
"W-WHAT?!"
Issei stood proudly.
"Never underestimate the power of justice and boobs!"
Akeno, lightning sparking from her fingertips, grinned darkly.
"You really picked the wrong girls to mess with."
Rias, her crimson aura flaring, raised her hand.
"Power of Destruction!"
Ryusei, finally fighting back control of her body, shouted through the struggle:
"DEVOURING—FLAMES!!"
A swirling inferno of cursed black flames erupted, slamming Unas with devastating force.
The combined assault of lightning, destructive power, and cursed fire obliterated Unas' spirit, purging him from Ryusei's body in a final scream.
{Occult Clubhouse—Later}
Later that night in the ORC clubroom, Ryusei groaned, holding her head.
"Ugh… I feel like I got hit by a truck and molested by a pyramid and then was set on fire..."
"That's... not far from what happened," Rias said dryly, sipping tea.
"You were really out of it," Akeno teased.
Ryusei blushed. "I was possessed!"
Issei, grinning smugly, put his hands behind his head.
"You're welcome, by the way. Dress Break saves the day again!"
Koneko chucked a can of soda at his head.
"Still a perv."