"So, you're finally done playing around and came back? Do you even consider this place your home anymore?" Remilia sighed, looking at Kars, who had finally returned, complaining about his behavior.
"Well, I couldn't help it. Besides, sometimes I meet other girls along the way and end up having sex with them, so it takes a bit longer. By the way, Aunt, did you and Flandre gain weight?" Kars touched Remilia's and Flandre's stomachs, noticing that they seemed to have a little more flesh. Had they gained weight recently from not exercising? But that shouldn't be the case, should it?
"It's the Arousal Mark. It makes the body change a little, just like how my breasts got bigger and started producing milk before. Patchouli is currently researching these things to add a bit more fun. It will go back to normal after a while." Remilia explained the situation.
"Yeah, Patchouli loves doing this now. She even transformed cat ears and paws before; it was really fun!" Flandre also explained some of the details, which made Kars imagine his two aunts with animal ears popping up on their heads and their hands turning into cat paws. It sounded quite appealing.
"Then I'll go find Patchouli and see." Wondering what sort of novelty Patchouli had come up with, Kars headed to the Great Library, where he saw Koakuma with a much plumper figure.
"Oh? Kars, you're back! How do you feel about me now?" Koakuma stood before Kars, wearing only a black lace lingerie set and black stockings. Her naturally ample figure had become even plumper, adding a mature, wife-like charm. Especially in just her lingerie and black stockings, combined with the glowing Arousal Mark on her belly, Kars's cock instantly became erect.
"Hehehe~ It seems the effect is excellent. Kars's cock got hard right away." Koakuma noticed this and laughed happily. Licking her lips, she walked toward Kars. Her full breasts swayed up and down as she walked. After reaching Kars, she squatted down and began to kiss his cock.
"What happened to you?"
"It's Lady Patchouli's doing. She enhanced my figure, turning me into what I am now, but it can't be maintained for long. That's a shame, especially since you like this current image, Kars."
"I liked the old Koakuma too. Your current appearance is also your future appearance; you'll get there when the time comes. Besides, isn't it great to enjoy Koakuma's body slowly transforming into this form over time?"
"Hehehe~ Is that so? Then do you want to taste the mature Koakuma now? A mature woman's fuck-hole is more satisfying than a girl's."
"Of course! Do it with me while lying face down with your buttocks raised."
"Mmm~ As expected, you like the doggy style position with mature women, to enjoy the pleasure of dominating this body, right?" Koakuma quickly got ready. After turning her full, fleshy, and tempting big ass toward Kars, he eagerly inserted his cock into her pussy. The moment he entered, Kars felt as if the fuck-hole was conscious, tightly wrapping around his cock and then wriggling. The friction between the fleshy wall and the cock made Kars's body tremble.
"You really love my pussy now, don't you, Kars?" Koakuma laughed triumphantly, seeing Kars's surprised expression.
"There's something even better, watch this~" As Koakuma started to move, the friction between the fuck-hole and the cock intensified. Simultaneously, the shape of the vagina inside changed during the motion, sending intense pleasure through Kars's body. He felt like his whole body was being electrocuted, giving him goosebumps all over. Moreover, the cervix sucked onto the glans, and with Koakuma's twisting, it was stuck tight, unable to be pulled free.
"This is so amazing… Koakuma's pussy has become so incredible…" Kars finally regained his senses and started to move himself, forcefully colliding his body with Koakuma's buttocks. He looked at the plump and fleshy, yet smooth and unwrinkled skin of her buttocks. When he stroked them, they were incredibly smooth. When Kars clapped them, making a crisp sound, he could immediately see a red handprint appear.
"Aah~ Kars, hit me more…" Hearing Koakuma's request, Kars looked at her mature face and horny smile, and started spanking her with both hands.
"Not only have you become lewd, but now you like this too?"
"Aah aah~ Because seeing you excited… my body gets excited too… so, vent more… vent your desires more~" Following Koakuma's plea, Kars lay on her back, grabbing and massaging her breasts with both hands, and began even more vigorous thrusting. Love juice splashed out of the pussy with every thrust.
"Aah aah~ Just like that… My pussy feels so good… It feels so good to be fucked by the big cock… Sex like copulation, being incessantly penetrated in my horny pussy is fantastic. I'm coming… I'm coming!!" With a loud moan, the cock ejaculated. A large amount of semen shot into the uterus, quickly filling the space inside. Since the cock blocked the cervix, the semen couldn't flow out, making Koakuma feel an unprecedented satisfaction in her uterus. Even her ovaries were packed full of semen.