"Now, let's see how you did," Rias said and looked through the test Arthur just did at school. As she did, the young pink-haired boy took a moment to admire Rias' outfit. She's wearing a white shirt with a few buttons undone so he can see a decent amount of her large breasts, a black mini skirt, black thigh-high stockings, red high-heeled shoes and a pair of glasses.
Her outfit helps distract Arthur from how nervous he is. He wants to make Rias proud.
Sensing his nervousness puts her hand on top of Arthur's. Causing the boy to blush. Rias didn't need to look to see what expression Arthur has. She puts Arthur's test on the table in front of them and then looks at her student, "You did well," Rias said with a warm smile.
"Really?" Arthur asked.
Rias nods, "Yes, they were a few mistakes but you did well overall, you can an A,"
"I owe it to you, sensei!" Arthur said and hugged Rias. His face pressed on her breasts. He didn't notice yet because he was too happy.
Rias bits her lip, "He's so cute!" she thought. Her sexual urge grew due to Arthur being so close. There were a few nights when she masturbated while holding a picture of Arthur. Now the real thing is right in front of her, she can't hold back much longer. She blames Issei for making her such a pervert.
She gently pushes Arthur onto the bed and gets on top of him, "It's time for your reward," Rias said with lust and starts kissing Arthur on the lips. The young boy has a million thoughts running through his head. Most of it is why Rias is making out with him. Part of him wanted to stop Rias because she was dating Issei. However, Arthur doesn't like Issei so he did his best to kiss her back. He tried to mimic her tongue movements.
He would wrap his arms around Rias and is currently holding his hands, "I'm getting so wet!" Rias thought.
They kiss for a while until they need to take a breath, "Was that your first kiss?" Rias asked.
Arthur nods, "Yes, I'm happy it was with you," he smiles.
"Aw. you're sweet," Rias smiles. The spots Arthur's bulge, "It's pretty big," Rias thought, "Just how big," with a smile, Rias starts unbuckling Arthur's pants.
"W-What are you doing?" Arthur asked as Rias opened his pants.
"Giving your reward~," Rias said with lust and removed Arthur's pants and boxers. Her eyes widen when she sees what Arthur is packing, "Oh wow! I didn't expect a boy your age! No wonder you have a deep voice," Rias said with amazement. She reaches out and wraps her hand around Arthur's shaft then starts to stroke it.
"Is this a handjob?" Arthur asked with a moan.
"How do you know about that?" Rias asked. She stops her hand to rub Arthur's tip.
"The boys from school showed me videos about stuff like this," Arthur moans.
"I did know you were such a pervert," Rias smiles and resumes stroking Arthur's shaft. She likes how he's throbbing in her hand.
"I-I didn't want to watch stuff like that. The guys keep shoving those videos in my face," Arthur explains.
"I believe you," Rias smiles then lowers her head until her face is close to Arthur's cock, "I bet the boy's in your class want me to do this to them," Rias said and opens her mouth and wraps her lips around his cock. She closes her eyes, starts sucking and bobs her head.
"Sensei!" Arthur moans and closes his eyes. He instinctively puts his hands on Rias' soft red hair.
Never in his wildest imagination would this happen. He wants to tell those obnoxious classmates and rub it in their faces but his mother raised him better than that. His father did something like and let's just say there's a reason why he's not around.
Suddenly, Arthur gets a strong feeling in his cock. Rias knows what is going on and happily drinks his cum. She didn't expect Arthur to let out so much. Rias had to pull out and let young Arthur spray his cum on her face, "Not bad, you let out more than Issei," Rias said and removed her classes.
"I do?" Arthur asked. His dick rehardens when he watches Rias open her shirt, "You're not wearing a bra?" Arthur gasped.
Rias chuckles, "Nope~" she leans in again and wraps her large soft breasts around Arthur's cock and moves her breasts up and down, "Do you know what this is called?" Rias asked. Her breasts are big enough to completely cover Arthur's manhood.
"Titty fucking!" Arthur moans.
"Correct," Rias smiles and moves her breasts faster. Getting a louder moan from Arthur. It didn't take long for Arthur to cum again. His seed shoots up and covers her breasts, "The warm-up round is over~ It's time for the main event," Rias smiles and crawls on top of Arthur. She lines her dripping wet pussy with his cock. She grinds on him to get Arthur hard again.
"Warm-up round?" Arthur asked with a surprised tone.
"What we were doing is called foreplay and we are about to have sex~" Rias explains. She raises her hips, rolls her skirt up and moves her black thong to the side then lowers her hips. Rias and Arthur moan together as Arthur's cock enters his teacher's pussy. "Your cock is reaching so deep inside me~" Rias moans and starts to move her hips up and down.
"So warm but wet," Arthur moans. He instinctively puts his hands on Rias' thighs. Arthur locks his gaze on Rias' bouncing breasts. He noticed that Rias' shirt was rolling down her shoulders. His eyes move to Rias' face, her eyes are closed again and have an expression of lust and pleasure.
"I'm so glad I made that deal with Issei," Rias moans.
"Deal?" Arthur asked.
Giggling, Rias opens her eyes and looks at Arthur "Issei has many lovers, I allow him to keep them so long as I get a lover of my own," she explains.
"And you picked me as your lover?" Arthur asked.
Rias nods, "I do. You're cute and handsome," her moans suddenly grew, "You just hit a sweet spot!"
"Is that good?" Arthur moans.
Rias nods, "Yes! Very good!" she moans and moves her hips faster. Her head tilts back and her tongue rolls out of her mouth.
Feeling bold, Arthur sits up and starts sucking and rubbing Rias' nipples. He had enough sense to rub his cum off her nipples before he starts sucking, "Oh Arthur~" Rias moans loudly and puts a hand on the back of Arthur's head.
They stay in this position until Rias moans, "I'm going to cum!" her hips stop and she releases her juices all over Arthur's cock, "Wow, you made me cum harder than Issei~" Rias moans. Her hips twitch a few times.
"I can keep going," Arthur said with Rias' nipple still in his mouth.
"Good," Rias smiles.
They changed positions. Both Rias and Arthur are lying on their side. Arthur is behind Rias and is holding her leg up and thrusting his hips. Rias moans and has Arthur's free hand on her breast. "Yeah, thrust your hips with all your might!" Rias moans, "Put all that exercise your mother gave to use!"
"Mother was right, I'm glad I did that training," Arthur thought. He can feel her pussy getting tight again, meaning she's going to cum again. So Arthur kept the steady pace he was going. Only stopping until Rias reaches her climax again.
"Can you go…one more?" Rias asked with a ragged breath.
Arthur nods, "Yeah,"
"Good boy," Rias smiles. They changed positions again, this time Arthur is on top and Rias has her arms over her head. Arthur pumps his hips and sucks and rubs his teacher's nipples again. "You love my breasts, don't you?" Rias asked.
"Yeah," Arthur nods and switches nipples to suck.
"I love how honest you are~" Rias smiles.
"Thank my mother for raising me well," Arthur smiles. He's resting his head between Rias' breasts. "I'm going to cum again Sensei!" Arthur moans.
"Let it out, Arthur! Fill my pussy with your seed!" Rias moans with lust.
"Sensei!" Arthur moans loudly and shoots his last amount of cum. "Can…we…do this again someday?" Arthur asked. He feels sleepiness taking hold of him. He never knew sex can be so physically demanding but it feels so good so it's worth it.
"Yes," Rias nods and wraps her arms around Arthur.
"Thank you," Arthur said and fell asleep.
Rias lets Arthur sleep in her arms until she tucks him into his bed. She leaves his bedroom so she can take a nice shower. On the way, she bumps into Arthur's mother, "Oh, hello Mrs. Farron," she smiles. Rias didn't bother to close her shirt and pull her skirt down. Claire can see her son's cum dripping down Rias' legs.
"Hello, Rias," Claire smiles, "I thank you for popping my son's cherry. He's quite fond of you,"
Rias smiles, "I am fond of him too. He's such a good boy,"
Claire reaches into her pocket and takes out a key, "Here's a spare key to the house. With it you can visit my son anytime you want," Claire smiles.
Rias happily takes the key, "Thank you for this wonderful gift!"