Mitsuki looked visibly relieved after hearing my reassurance.
"I've been worried about stomach problems for so long! Yuji-kun, you don't know how much the treatment will help me. You're the best."
"Hahaha..."
Pretending to be somewhat embarrassed at her praise, I chuckled and scratched my head innocently, though my finger was already at work as I used my quirk to create lube and inserted it into Mitsuki's asshole.
After all, acting innocent is one thing, but one should have their priorities straight and must always be focused on the holes… I mean goals, right?
'Ahem…'
Feeling her asshole being poked, Mitsuki's reaction, while a bit shy, was not as intense as Izuku's mother's had been.
'Has she used her asshole before?'
I couldn't help but wonder, so I decided to ask directly.
"Auntie, have you used your asshole before? And, just a reminder—please make sure to always keep your asshole nice and clean for every class from now on."
"Huh? Well… actually, I once used a massage stick there out of curiosity," she admitted, blushing as she spoke in a low voice. "I didn't expect to like it so much... I got a little addicted and kept doing it. Even my husband doesn't know about it..."
Her cheeks reddened, and I raised my eyebrows in amusement.
'You naughty milf!'
Honestly, I'd seen scenes like this plenty of times. As an assassin in my previous life, I'd come across all kinds of hidden secrets of people—one kinkier and more shocking than the other.
And oftentimes, it was these seemingly innocent housewives who turned out to be the most promiscuous and kinky.
Even I had fucked so many of them behind their husbands' backs, in ways they'd never dare to confess, and most were thrilled to have it.
Those experiences were also some of the many reasons why I'd come to see love as nothing but a joke.
My philosophy about life had always been simple.
Life is precious—you come into this world alone, and you'll leave it alone—there's no one you can truly rely on but yourself.
Regardless, compared to those sluts I'd encountered in my previous life, Bakugo's mother's little kink was actually quite innocent and cute—I liked it.
My cock got bigger again with excitement.
With the lube now applied properly, I didn't waste any time. Turning her around in a doggy style and positioning myself behind her, I pushed my cock into this Milf's asshole.
"Ahh… It's so big… You're reaching places... I couldn't even get to with my own toy... Ugh!"
Mitsuki moaned and tightly grasped my hands that were on her breasts as she shook her waist back and forth to match my movements.
My cock was covered by the tight and smooth flesh of Mitsuki's anal walls.
The inside of her ass was as hot as her pussy. It was so stimulating that the pleasure was almost overwhelming, and I pumped for only two or three minutes before bursting out.
Splurt! Splurt! Splurt!
"Ahhhh… the serum... It's filling me... ahhh..."
Suddenly, her body tensed up, and she climaxed once more, her pussy quivering with each shot of semen I pumped into her.
Leaning in, I lightly licked her ear and whispered softly, "This is just the beginning; I'll keep filling you with my cum until there's no room left."
Then, I grabbed the back of Mitsuki's knees with both hands and lifted her effortlessly into a reverse stand-and-carry sex position with my cock still inside her, slamming into her asshole from bottom to top like a piledriver.
Puck! Puck! Puck! Puck!
"Ahhhhh..."
Her beautiful breasts bounced wildly with each thrust.
Without stopping my pumping and thrusting, I carried her over and walked towards the mirror in the bathroom.
"Auntie, look. The results of this beauty class are impressive, don't you think? You look more beautiful than ever."
The hot Milf in the mirror had all her private parts completely exposed in the most vulgar way, and she was tightly held in my arms from behind and fucked hard in the asshole by my big cock.
Her breasts rippled with each movement, her skin had a deep, lustful pink glow, and her face had an ahegao expression, completely slack with pleasure after multiple orgasms.
Due to the effect of my quirks, Mitsuki was completely engrossed in the pleasure of sex and satisfaction that came after seeing her even more beautiful appearance. Her mind was hazy, and she spoke incoherently.
"Ahhh... I love it... ah... I'm cumming again…"
"I am honored to hear that Auntie enjoyed my class and is satisfied with my service."
Smiling evilly, I leaned in to nip and lick her neck, leaving my mark along her soft skin.
Her intoxicating scent once again rushed to my brain; my pleasure surged, and I pressed her firmly against the mirror, fucking her asshole even harder.
"Yes... I'm coming... again... oh, oh, oh!"
That hot bath lasted another hour and a half, and by the time I stepped out, the water had gone cold.
I cummed a total of six times in Mitsuki's asshole, and her belly looked swollen, as if she were three months pregnant.
Before wrapping up, I made sure to insert a set of anal beads into her asshole and instructed her to remove them only in the toilet after about half an hour.
Of course, having been fucked silly by me, she was in no condition to remember on her own, so I used my quirk [Absolute Hypnosis] to implant the instructions directly in her mind.
Afterward, I applied my beauty quirks on her again to ease her into rest and sent her to the bedroom to recover.
Once I was out, I hypnotized Bakugo's father too, making sure he would never have the idea of touching Mitsuki ever again, let alone having sex with her. And if she were to become pregnant, he wouldn't suspect that the child wasn't his.
Finally, I made a quick stop in Bakugo's room to play video games with him before heading home.
The next day, I didn't bother going to school. Instead, I used my quirk [Absolute Hypnosis] to make everyone in class—teachers and students alike—think I was obediently sitting in my seat, but in reality, I was spending my days alternating between Izuku's and Bakugo's houses.
Some mornings, I would start at Izuku's place and head to Bakugo's in the afternoon, and other times I would reverse the order.
Izuku's mother had gotten used to shyly asking me to give her my semen regularly, and, of course, I never refused.
Thanks to my daily efforts, her body has developed to the point where her uterus can easily handle five consecutive loads of my semen.
Mother Izuku was getting happier and happier.
Under my hypnosis, she firmly believed that her son's condition was improving little by little and that he would definitely have a quirk in the future.
On the other side, Mitsuki seemed to have become absolutely infatuated with my "Beauty Class."
Every time she saw me, she would automatically take off all her clothes without hesitation.
Her favorites were the "semen hairspray" and anal sessions.
Every time I'd deliberately pretend to forget, she would ask me to take these two classes. And occasionally, when Bakugo's father was at home, he would hear us accidentally from across the walls and end up cumming in his pants.
Not to mention, he was so impressed by my techniques and so grateful for me fucking his wife that he even decided to sponsor me, giving up almost 80% of his monthly salary.
Each time he did so, I couldn't help but feel his kindness, and in return, I would fuck his wife, Mitsuki, even harder.
Under the nurturing influence of my quirk, both of the MILFs have grown more beautiful and charming. Mitsuki's breasts had swelled to an H cup, and Izuku's mother's stamina had greatly improved, though she would still occasionally faint from exhaustion.
But this only made fucking her even more enjoyable.
And just like that, time went by, and soon enough, my mother gave birth to my younger sister. Around the same time, both Izuku's mother and Mitsuki became pregnant with my child as well.
....
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Some sample illustrations of exact scenes from chapters can also be found on my discord.