About an hour later, the vibration of his phone in his pocket pulled Makoto awake. He blinked his eyes open. Mika, Mafuyu, and Yuna were all asleep. Ayane, however, was gone from her seat in front of him.
He checked the message.
Ayane: Come and pay your debt, boss. In the restroom. ;)
Makoto glanced around. The Green Car was quiet: A few businessmen were typing on laptops, and an old woman was dozing. Mika was asleep in the seat across the aisle, her book resting on her chest. Mafuyu was a lump under a blanket next to her. Yuna, beside him, was dead to the world, her mouth slightly open with a tiny line of drool on her chin.
Makoto carefully extracted his hand from Yuna's grip and slid out of his seat. The low hum of the train was a constant lullaby beneath his feet as he walked down the aisle. Every step felt charged. The risk and the thrill of being caught somehow turned him on even more. "Ayane knew exactly what she was doing." He thought.
At the end of the car, he found two restroom doors. One was locked with a red indicator. The other was slightly ajar, like a clear invitation. He pushed it open and stepped inside, closing the door behind him. The lock clicked shut with a soft sound.
Ayane was there, leaning against the small stainless steel sink. She had already unzipped her dress, pulling the top down to expose her full, braless breasts. Her dress was hiked up around her waist, and a small, neatly trimmed triangle of dark hair pointed to her glistening pussy. Her panties were gone.
"Took you long enough, boss," she purred, her voice a whisper that filled the small space. She turned around, bracing her hands on the wall and sticking her ass out.
"You owe Mika and me for being the referees last time," she added, wiggling her hips. "And I expect a big payment." She looked at Makoto over her shoulder, her dark eyes heavy with want.
"No foreplay," she commanded. "We don't have time before they wonder where we are. Just pull it out and fuck me. Quick and dirty. That's the kind of payment I like."
"Geez, horny slut. Give me back the innocent Ayane in the lecture hall back then," Makoto smirked, unbuckling his belt. He pulled down his pants, rubbing the head of his thick cock against her wet entrance.
Ayane let out a low, throaty laugh that echoed off the metal walls. She pushed her hips back, trying to capture him, but he pulled away just enough to keep teasing her.
"Innocent Ayane from the lecture hall? Oh, honey, that sweet, nerdy girl you lent manga to died screaming the first time you fucked her and let Mika and Yuna watch," she purred, her voice thick with lust. "This is what you turned me into, husband. Now are you gonna fuck me or are you gonna reminisce?"
She reached back, grabbing his cock and trying to guide it to her entrance. Her grip was hot and desperate. "Pay up! Don't be a fucking tease, harem king!"
The train rumbled and swayed slightly, a vibration that traveled through the floor and up Makoto's legs. The sink was cold against her hands.
"I swear to God," she growled, her voice dropping to a frustrated whimper. "If you don't put that fat cock inside me in the next three seconds, I'm going to scream. It'll be a scream about how you're a pussy who can't even satisfy his wife."
She looked over her shoulder, her eyes dark and demanding. "Now, fuck me as if you hate me. Make me walk out of here with your cum running down my leg, Makoto!"
Makoto shoved into her, bracing the back of her head so it wouldn't crash into the sink. "You're talking like a corrupted heroine from a cheap eroge, nerd."
Ayane let out a guttural gasp as he filled her, the sudden thick fullness stretching her perfectly. A shudder racked her body. "Fuck!" she hissed, bracing herself against the wall. "Yes! Just like that!"
She chuckled, low and breathless, at his taunt. "If I'm a hentai heroine..." she panted, pushing her hips back to meet his brutal thrusts. "Then you're the sick fuck who wrote the script, you degenerate. Now… give me the bad ending…"
"Well, well, if humiliation doesn't work, better try something else. I know exactly what her weakness is..." Makoto leaned in to bite her ear and whispered. "Ayane, I love you and Asuka both."
As he whispered those words, Ayane's entire body seized up. A strangled moan escaped her lips, and her muscles clenched around him tight enough to make him grunt. "Oh, you bastard…" she whimpered, her voice cracking. "Don't… don't say that shit… not when you're fucking me like a cheap bitch in a train bathroom…"
Makoto felt a hot tear splash onto his hand, and he realized she was crying, overwhelmed by the brutal, romantic whiplash.
"You're the worst…" she sobbed, her voice thick with pleasure. "I love you too… you and your fat, slut-making cock…" She started moving wildly, grinding back against him, chasing her own release with feral energy. The sound of his hips slapping against her ass was loud in the small room, punctuated by her filthy, tear-filled sobs.
"Harder!" she demanded, her voice raw and broken. "Mark me! I want to walk out of here smelling like your cum! I want to walk back to my seat and feel you dripping out of me! HURRY! Before they miss us!"
Makoto slowed his thrusts, varying between long, slow strokes and hard, violent ramming. "I know you're weak to this romantic shit, despite your pervert exterior, Ayane."
He remembered what Ayane said back then at the clinic, "But hey, at least we should have a marriage? Kind of?" which Yuna brutally pushed away. So, he went for the ultimate attack. "Let's get married for real, after this trip." His words, spoken softly into her ear, stopped everything.
"Wha…?" she choked out, her whole body going rigid. "Get married? Don't joke about that…" she gasped, her voice barely there.
The way he was fucking her now, the agonizingly slow, deep strokes that made her feel every inch of him, followed by a sudden, punishing slam, was completely unraveling her. It was methodical and loving and devastating all at once.
Ayane couldn't maintain the act. "Y-you… you can't just say that…" she whimpered, her voice cracking completely. The perverted facade melted away, and underneath was the shy, nerdy girl from the lecture hall, overwhelmed and crying with joy. "You can't just propose while you're balls-deep in my cunt on a moving train, you absolute… you…"
Her words dissolved into a ragged sob. This was her ultimate fantasy, realized in the most depraved way possible. The emotion crashed through her and brought the orgasm with it.
It wasn't the frantic, desperate peak she had been chasing. It rolled up from somewhere deep, all-consuming, the kind that started in her core and radiated outward until her whole body was shaking.
"YES!" she screamed, her voice echoing in the small metal box. "YES! YES, I'LL MARRY YOU! FUCK, YES!"
Ayane's body clamped down on him, rippling and spasming with an intensity that made his vision go white at the edges. Her legs gave out, and she collapsed against the sink, convulsing with the force of it.
Makoto emptied himself into her. He held her up, his arms wrapped around her waist, keeping her from sliding to the floor as she trembled through the aftershocks. For a long moment, the only sounds were their ragged breaths, the hum of the train, and Ayane's hiccuping sobs.
When Ayane finally turned her head to look at him, her face was tear-streaked and makeup-smudged. "You are such an asshole, Makoto," she whispered, before breaking into a watery and happy grin.
"Yeah, I'm an asshole, and you're a pervert!" Makoto chuckled, slowly pulling out of her. He lifted her up, enjoying the sight of his cum dripping down her thigh before kissing her lips.
Ayane let out a blissful sigh as he withdrew from her, her body still trembling. She glanced down at her legs, watching with hazy, lewd fascination as a thick milky line of his cum began to dribble down her inner thigh.
"God, you're a messy bastard," she whispered, her voice filled with adoration. "You marked me all up…" Then sudden panic hit her. "Oh my god! How are we supposed to walk back in there? My face is a wreck! My legs are jello! And I'm still full of your baby batter!"
"Gonna carry you back like a princess then?" He scooped her up into his arms, princess-style. Ayane let out a surprised squeak and instinctively wrapped her arms around his neck.
"You're insane!" she hissed, burying her burning face in his chest to hide her grin. "People will see! They'll see my fucked-out face and your cum running down my leg! This is the most humiliating but hottest thing anyone has ever done to me!"
Makoto kicked the bathroom door open and strode back down the aisle. Ayane kept her face hidden, but he could feel her body shaking with silent, happy laughter.
A businessman typing on a laptop glanced up, his eyes widening in shock. He quickly looked back at his screen, pretending he saw nothing. An old grandmotherly type, however, caught Makoto's eye and gave him a slow, knowing wink.