«Hakuto... wake up, Hakuto... it's time!» Yuzu whispers.
«Y-Yuzu... what the hell do you want now...?» he mumbles, his voice groggy and irritated, eyes still closed.
Hakuto is still half-asleep, but he immediately senses something odd — a strange weight pressing on his chest, heavy but soft.
And in an instant, he realizes exactly what it is.
He opens his eyes wide, and the pale moonlight filtering into the room is more than enough to show him Yuzu — wearing her usual light lace lingerie, more transparent than it should be — lying on top of him, chest to chest, with the smile of a child about to pull a prank.
«W-What the hell are you doing...?» Hakuto whispers, grabbing her arms and flipping her to his left.
Yuzu simply puts a finger to her lips, signaling him to stay quiet.
«Don't you remember what we talked about this morning? The plan to help you gain confidence with Rika's body? It's time to put it into action!»
«I already told you, there's no way! I'm not going to lay a single finger on Rika — especially while she's asleep!»
«You're telling me you don't want to help your sister gain control over her powers...? You're so selfish! If another pervert tries to attack her again, it'll be your fault!»
«You're seriously trying to guilt-trip me just because I don't want to grope my sister while she's sleeping...? That's disgusting, and if she wakes up, she'll kill me at the very least!»
«Oh, if that's your only problem — that you're afraid she'll wake up and catch you in the act — then you don't need to worry.»
At that moment, Yuzu's eyes glow red, and a faint crimson mist of the same color spreads across her skin.
«Yuzu... what are you planning to do...?!»
«Shut up and let me handle it!»
Then, she stretches her arm toward Rika, and an ethereal blood-colored trail flows from Yuzu's fingertips, slipping into her sleeping sister's ears, nose, and slightly parted lips.
«There we go!» Yuzu says with a satisfied voice.
«I demand an explanation before I punch you!» Hakuto snaps, still keeping his voice low.
«Calm down, I didn't do anything to her! I just used a vampiric spell to put her into a deep sleep. Right now, not even cannon fire could wake her.»
A second after those words, a soft, feminine moan — incredibly sensual — fills the air.
But it doesn't come from Yuzu.
Alarmed, Hakuto quickly turns to Rika — for a moment, he mistakes it for a moan of pain — now lying on his right side, while Rika is curled up on the far edge of the bed, in the same position she usually sleeps in.
But it's not a moan of pain.
Slightly lifting his torso, Hakuto can clearly see Rika's expression: her cheeks are flushed, her breathing heavy and ragged — like she's running a marathon — her mouth slightly open, tongue timidly poking past her lips.
«Yuzu... what did you do to her?!»
«I just told you — I put her into a deep sleep... a deep sleep where she'll dream about her most intense and hidden erotic fantasies — the ones she's too embarrassed to even admit to herself. It's to... how should I say... set the right mood,» Yuzu concludes with a mischievous, playful smile.
«But that... that's a succubus specialty! You said it yourself — her succubus power is stronger than yours... so how did your magic work on her?»
«Oh, it's simple... my magic may be weaker than hers, but my mastery of succubus powers is way better. That, combined with how the mind is more vulnerable during sleep, made it possible. See? It's your fault for not even trying to help her gain full control over her powers!»
Rika's moans grow sharper and more intense, her body curling up tighter, almost with her knees pressed to her chest.
«Oh, Hakuto... Rika's moans of pleasure... isn't it music to your ears? Well, since you're not planning to take advantage of the opportunity I created for you, I'll just do it myself. It'd be a shame to let such a chance go to waste, don't you think?»
«Y-Yuzu... you're really a pervert!»
«No, I'm a succubus,» she replies with an innocent smile. Then, once again, she rolls over on top of Hakuto, moving closer to her sister and reaching out toward Rika's butt.
In that position, Yuzu's crotch presses against Hakuto's, and...
«...it seems this situation is affecting you more than you're letting on...» Yuzu smirks, feeling something large and hard pressing against her lower belly.
«Well, obviously...» Hakuto mutters, almost ashamed, «...but that doesn't mean I think this is okay!»
But Yuzu doesn't even listen. She stretches her arm as far as she can, grabbing the waistband of Rika's pajama pants and...
...pulls them down in one swift, sharp motion.
Rika's perfectly firm and round butt — covered only by white panties being swallowed by her plump cheeks — is revealed in all its glory, like Yuzu just pulled back the curtain on a work of art.
That heavenly sight, combined with Rika's increasingly intense and sensual moans... only a superhuman effort of will keeps Hakuto from losing control of his hands.
But Yuzu has no such restraint.
She immediately reaches both hands toward her sister's butt — her fingers sink into the soft flesh. She starts massaging and squeezing it harder and harder, and Rika's moans rise with every motion.
Hakuto gulps — his face flushed with embarrassment — but he still can't take his eyes off her.
«Are you absolutely sure you don't want to join in too? Succubus powers lose their effectiveness if used repeatedly on the same person, so next time, Rika might not be so... willing,» Yuzu teases.
«I-I told you I'm not interested...!» Hakuto says, but his voice doesn't sound very convincing.
~I can't! I can't! I can't! Hakuto, resist!~
Yuzu's smile grows even more wicked.
~He's breaking! He's breaking!~ she tells herself with satisfaction. Then, as if to push him over the edge, Yuzu spreads Rika's butt cheeks — and even in the dim light, the liquid dripping between her thighs is clearly visible to both of them.
Hakuto isn't an expert with girls, but even a beginner like him knows what that liquid means. Rika is extremely — overwhelmingly — aroused.
«See, my dear brother? Looks like our precious Rika is really enjoying her dream. I wonder who the lucky guy is? Maybe it's you. And if that's the case... I'm sure the idea of reliving that same dream while awake will finally erase all those stupid beliefs she has about losing her virginity only to the love of her life!»
«I-I... I don't...»
Hakuto's voice trembles — he stutters, on the verge of breaking down.
«Come on, Hakuto! This is your chance! Your chance to have sex with Rika! Now or never! Go!»
«Y-Yuzu... stop it...!»
«Guess I'll give you a little push!»
Yuzu's right hand leaves Rika's butt and rests on Hakuto's forehead. In a fraction of a second — before he even realizes what's happening — she uses her succubus magic again, this time on him.
As if moved by a higher will, Hakuto's hand instantly reaches for Rika's butt, squeezing it so hard that...
«Oops...» Yuzu giggles, getting off Hakuto and rolling back to her side of the bed.
...Rika's fingers instantly clamp around Hakuto's wrist, squeezing with such strength he almost feels it snap.
«What the...?» Rika mutters sleepily, still gripping Hakuto's wrist tightly.
Rika's eyes drop between her thighs. Her pants are down, a wet stain marks the sheet beneath her intimate area, and... Hakuto's hand is glued to her butt.
«R-Rika, I can explain! It's not what you think — it was Yuzu who—» Hakuto trembles with fear and shame.
Before he can finish the sentence, Rika jumps out of bed. In the next instant, large black wings sprout from her back, her skin tinted with a faint violet hue, her irises blood-red, and her body wrapped in a burgundy aura. Her gaze, filled with murderous rage, locks onto Hakuto and Yuzu.
«I... I...» she says, stretching her arm toward them — her hand open, a glowing orb of energy forming in her palm — «Hakuto, Yuzu... I'll kill you!»
—BOOOM!