I dunno. Also obligatory all characters are 18+.

"Another day, another dollar." The saying goes. Or I suppose it would be yen in this country? Still if we're just getting one yen, this is a scam since a singular yen is worth much less than a dollar. I'll have to remember that if I ever visit the U.S.

These idle thoughts pass by my brain as I'm grading some first-year math quizzes as a 'favor' for a colleague, Tanaka-sensei. It's relatively simple stuff, even for my math-averse brain, and she promised me some rare bread from a local bakery as payment, so I don't mind doing it too much. Also helps that she's pretty cute, though I'm married so that's all I can really say. Unbeknownst to Tanaka-sensei though, I'm also using this as an excuse to not visit the Service Club's room for once. She's been insisting I show up daily now, but every time I show up, we end up…

"Nearly done here." I mutter to myself, glancing at the small pile of papers left to look through. Leaning back, I idly gloss throughout the room while I build up the motivation to finish grading. All of the other teachers are either already home or closing up club activities. Right when my sight centers on the door, it opens unexpectedly.

"Hello?" The voice quietly asks the room. What's she doing here so late?

"Tsurumi-san, it's already past club activity hours. What are you still doing here?" I sigh.

"Ah, Hachiman. I was wondering why you didn't show up to the club today?" Tsurumi Rumi replies, quietly yet with a hint of accusation as she stalks towards me. My eyes can't help but stray towards her fluttering skirt, but I dropkick those thoughts out of my brain and focus my attention on her blue eyes.

"I'm just your advisor, remember? I don't need to be showing up to club activities every day." I gesture towards the pile of papers. "Anyways, I'm just helping grade Tanaka-sensei's quizzes as a favor. Now go home."

Turning back towards my papers, I pick up my pen again. Even if it's Rumi, she should understand this much. Now hopefully she'll go-

"You do need to show up to club, Hachiman."

My shoulder suddenly feels much heavier than I remember it being. Flicking my eyeballs towards it, I see the traces of what I presume to be Tsurumi's hand gripping me hard. Well, shit. Bracing myself for a conflict, I turn my seat towards her so I can tell her off properly.

"Look, Tsurumi-san, I can't just- " I start.

"It's Rumi to you, Hachiman." Tsurumi cuts me off mercilessly.

"This is the teacher's lounge, Tsurumi-san." I shoot back. She may think I can be bullied, but her cold pressure isn't nearly on the same level as my wife's. "I get no one's here, and you've known me since you were a kid, but this is the one place I won't have you disregard my authority."

"OK then, Hikigaya-sensei." The last name and honorific sounds more like a curse as she pronounces them, her face grimacing a bit as if she just swallowed something bitter. Without warning, her expression becomes much warmer though. With her hand still gripping my shoulder, she sits on my lap and straddles me like it was the most natural thing in the world.

"I. Want. You. Again." Those words slither down my ear, stimulating my third leg extremely quickly. Not that it needed much help with her butt rubbing against me at the same time.

Unluckily for her though, I have some resistance to her at this point. And despite my own promise to make sure Rumi ends up being a well-adjusted adult, I would like to at least come home and see my wife's face without feeling too guilty because Rumi drained my balls dry earlier.

Before I lose reason, I grab her shoulders and try to firmly get her off me, but she counters by gently guiding my head with her free hand towards mine, our lips gently meeting for nary a moment before she pulls away again.

"Please, Hachiman, you're the only person I can trust." Rumi smiles gently at me. "Especially with…this." I feel her grind her groin against mine, making me wince as my third leg attempts to burst through my pants. "Seems like he's a bit more honest than you. Maybe I should reward him?" Her smile changes to a smirk as she knows her strategy has shredded my defenses to bit.

Damn it, if I was just a bit stronger… if it was anyone else except Rumi…

Grimacing, yet still looking forward to what was to come, I nod slightly. God, I'm a mess.

Rumi lowers herself from my and tugs down my pants and boxers, revealing my rod standing at attention and ready for it to be serviced. Without hesitation, she lowers her lips down and starts sucking hard, prompting an unintentional jerk from the unexpected pleasure, pushing my penis deeper inside her mouth.

Double checking the windows and the doors, I confirm that no one is within viewing distance as the erotic sounds of a blowjob started to fill the room. Looking down at Rumi again, she releases my erection from her mouth with a small popand starts to slowly stroke it with her left hand as she stares at me with her eyes, eyes that look so uncomfortably similar to who's supposed to be the main woman in my life.

"So, do I ace this portion of the exam yet?" Rumi smiles sultrily as she quickly gets back to work on sucking, increasing both her suction and pace. Between that and her hand still stroking where her mouth wasn't, I feel myself being pushed to the edge sooner than I expected.

"It's…adequate." I squirm, my words not matching my actions as Rumi's eyes trace every reaction from my body.

"…I see. I'll stop then."

Rumi suddenly stops, my cock feeling suddenly a lot colder than I'd like without her mouth around it, though I can still feel her hand grasping my tool as she pushes herself up a bit and lean towards me. Despite the response sounding cold, she flashes me a warm smile as she strokes my chin with her spare hand.

"Of course, if you'd like to…give me extra tutoring to make up for today, no one's home tonight…" Her voice trails off, the implication being clear as day to me as she squeezes my dick for emphasis.

One would think at this point that I could just get up and walk away from her easy since I'm married but, I don't know, I just feel compelled by Rumi's actions every time she does something. At first, I played along hoping it would be a one time, or even two-time thing. I can rationalize them easy thanks to my prior cynical nature. But this is something else entirely…

"OK…" I let out those letters as indicator of my complete defeat to Rumi before standing up and pulling up my underwear and boxers. Rummaging through my pockets, I dig out my phone and start a text message as Rumi tidies herself up.

Won't be home tonight. Being dragged out drinking by coworkers.

Pressing send, my phone accepts the request and sends the pixels that will explain why I'm not home tonight as Rumi looks at me in eager anticipation of what's to come.

"Cum inside me, Hachiman!"

With those words, I take hold of her hips and give one final thrust as I finally release my load inside my student as she throws her head back in pleasure and grinds her ass towards my groin, her body trying to milk me for all I'm worth. I can't see her face in this position but I'm sure it's one of ecstasy, if our previous trysts are anything to go by.

I stay still for a moment, reveling in my orgasm as I feel myself spurt several times inside Rumi. As my body stopes shaking, I await the usual pang of guilt that hits me after I finish with Rumi, but…it…doesn't…show…up.

Meanwhile, she gets impatient after noticing my lack of movement, extricating my slowly softening penis from her pussy. A small trail of cum leaks from her hole, but it seems she doesn't mind the stains as she pulls me towards her for cuddling post-coitus in her bed. I never knew that she lived alone until now, which probably explains her indifference.

"…Thank you for coming tonight, sensei." Rumi whispers, her hand grasping mine as she spoons me. It's probably a perverse sight, the smaller woman being the big spoon in this situation, but at this point it's a clear indicator of who has the advantage.

The hand is a welcome source of warmth for me, as my realization still has me left cold inside. Despite this entire situation being fucked, feeling Rumi behind me just feels…right in this moment in time. While I'm ruminating on these pointless thoughts, the next words she whispers into my ear shatters what little resolve I had left.

"Don't leave me, Hachiman."

I feel Rumi's legs wrap around me, her grip tightening on my hand. Unconsciously, I squeeze back.

Didn't want to get too flowery describing the body mashing in the second scene, but I'm sure you can fill in the blanks. 95% chance I don't add a new chapter though, just to give realistic expectations. I'm surprised I'm back here myself.