DxD: A World Where T*tties Defy Gravity [ Chapter 85: Serafall Flashback! ] (Patreon)

Flashback:

"S-Serafall?" Rex, who at this time, looked to be about fifteen years old, spoke, clad in nothing but his boxer shorts and lying in his bed in the Gremory Manor. "What're you doing?"

"You know how I mentioned that I was going to teach you something useful, Rex?" Serafall, clad in her magical girl's outfit, whispered, as she slowly crawled up Rex' bed until she reached her godson. "Well, here it is." The current Satan reached to the sides of her outfit, and pulled it off, revealing her large breasts to the son of Sirzechs.

"Come on, Rex." Serafall licked her lips, as she reached down and took hold of Rex' hand. "They're all yours~"

Sera lifted Rex' hand up, and guided it to her right breast. She gave a light groan as Rex, by instinct, squeezed. "Ahh~ not so hard, Rex." After a second, after Rex with her guidance had loosened his clench on her breast, she smiled. "That's better."

"I don't know if I'm comfortable with this…" Rex muttered, before Serafall placed a finger to his lips.

"Shh." She whispered. "You'll get used to it, Rex. Trust me, you'll learn to love these breasts~"

As Serafall took her finger away from Rex' mouth and made to lean forward into him, the door to Rex' bedroom opened, revealling Grayfia Lucifuge standing in the doorway.

Flashback end:

"I'll... consider it, Serafall." Rex replied. "Even if I wasn't comfortable with what you did, it's in the past. I'm..." His eyes flicked to Fianna's, and then back to Sera's. "...Willing to give it another shot with you."

"Yay!" Serafall squealed, wrapping her arms around Rex and hugging him, though Rex noticed that her hug was a lot more gentle than usual. "You won't regret this, Rex. I promise~"

Rex grinned, as Serafall let go of him.

"I bet." Rex replied. "Don't you have a little sister to dote on more than me?"

"Oh, fuck!" Rex inwardly sniggered at his childish godmother dropping the 'F' Bomb. "I forgot!" She then dashed away, in the direction of some of the younger Devils that were gathered in a group, talking to each other. "SONA~!"

Glynda sighed, and followed her King, in exasperated pursuit. Once she and Serafall were both out of earshot, Rex turned to Fianna.

"You put Serafall onto this, didn't you?"

"Who, me?" Fianna spoke, innocently. "What on Earth would give you that idea?"

"One, that every time Mom tried to stop her from doing what she did, she just replied that she was doing nothing wrong and 'teaching her amazing godson the wonders of the female body', and probably still, prior to just now thought that way." Rex replied. "Two, the fact that you're the only person that Serafall will really listen to. Three, I can practically hear your 'Oh, Crap!' Smile."

"...Okay, I did it." Fianna replied. "You got me, Rex."

"Thought so." Rex replied. "Why though?"

"Because I like the idea of a threesome with you and Serafall?" Fianna replied. "Because I fancied pushing the pair of you closer to that end?"

Rex facepalmed.

"Eh. At least you're honest about it." He replied. "Always something I like."

"Yeah. Honesty is important, you know." Fianna replied, walking towards Rex, and running a finger across the top of his chest, that was exposed by his top button being undone. "Just like I'm being honest when I say you're hot onto the level of Eros. No, even more hot. At least you actually have a cock. Or so I'm told, at least."

"I don't even want to know how you found out." Rex muttered.

"Good, because I wasn't going to tell you." Fianna replied. "I gotta have my secrets, after all~ Anyway, I'm gonna go chat with Diehauser, since he's just arrived. See you~"

"Later." Rex replied, as Fianna walked away, making sure to give her hips a little extra sway to them as she walked.

"Man, Rex." Valian remarked. "Two Satans hitting on you? I've heard of lucky bastards with harems, but you're a damn Charmer, Chick Magnet and-"

"Enough with the TV Tropes references, Valian." Rex remarked, as he looked up and saw a circle of young Devils gathered in the middle of the room. "Hey look. Shit seems to be going down."

Rex and Valian walked over to the scene of what was going on, and saw two people in the middle of the crowd.

The first of the two people was a fair-skinned young girl of around 16 years old, with silver eyes and black, neck-length choppy hair that gradated to dark red at the tips. She wore a white, high-neck décolletage blouse, a black and red skirt, an overbust corset and a black belt, bordered in red.

She also wore brown straps on her blouse. She wore thigh-high black stockings, reaching to a few inches below the hem of her skirt, decorated by an image of a long-stemmed rose. 

Her red-soled black boots contained four straps and buckles on each boot. 

She wore a red, hooded cloak that had a singular clip on the right shoulder in the shape of a red rose, and both the cloak and the stockings showed tears from hard-wear, or so Rex thought.

The second person was a dark-skinned individual that had lots of black magic-like tattoos on his face, and on his upper body. He had green hair that stood on its end, and matching green eyes. He wore punk-style attire, and had ornaments on his pants that jingled and clanked as he walked towards the silver-eyed girl, who was in very obvious discomfort.

"C-mon, you little cutie!" The punk-looking Devil grinned at the silver-haired girl. "Don't you want to have some fun with me? I'll make sure to go slow with you~"

"Get away from me!" The silver-haired girl replied, inwardly cursing herself for not bringing her Crescent Rose with her.

"Oh, you won't be saying that soon." Zephrydor Glasya-Labolas replied, as he stepped forward and reached out, very prepared to touch the girl, who was cringing away from him.