Kureha really did not expect to ever be in that situation.

When she found out that Kirito was trapped in this place called "Underworld", she knew she had to do something to help, after all, she had a debt to repay for everything he and his friends did for her in that incident on GGO. The same went for Zeliska, and the two girls ventured into that new world determined to help the Black Swordsman.

Kureha thought about having "that person" go as well. But at the last minute, she decided that it wasn't a good idea. She loved her childhood friend and boyfriend, and wouldn't want him to risk his life in such a dangerous mission, Zeliska thought the same, and so, they left him behind.

As the two girls finally reached their destination, and there they fought many battles alongside Kirito and his new friends from Underworld. She wasn't sure how much time it had been in the real world, but in there it had been many months. After spending all that time there, she'd often find herself admiring the Black Swordsman's peerless skill with his swords, his brilliant leadership and intellect, not to mention his dashing looks. Back in GGO Kureha didn't use to spend much time with Kirito and his gang so she didn't really understand why so many women followed him around, now, she was starting to get it. Not to mention that her life had been saved countless times by him.

And so, when one day she was taking a casual stroll through the streets of Centoria in the evening, she couldn't really resist when Kirito approached her, lowered her guard with his sweet talk, picked her up like a princess and started to take her in the direction of his tent.

As she was getting carried, Kureha was blushing furiously. Apart from her heart beating like crazy, she was feeling a little bit guilty for not being able to push him away and resist his charms a little bit more. After all, she loved someone else, and she liked to think that those feelings still existed even after all this time. And besides, she heard that all of the other girls were also "doing it" with Kirito to help fill the gaps in his memories, even Fanatio who was in a romantic relationship with Bercoulli, so, if it was for a really good cause, could it really be called cheating?

Kureha's rationalizations made her able to accept that predicament more. Also, she was very lonely, and was in desperate need of something to fill the void left by her absent boyfriend.

As they finally reached the tent, Kirito carefully laid her upon his bed and started to take off his shirt. Kureha was stunned by how hot he looked, she couldn't stop staring at his toned abs, that was the kind of physique one would expect of a professional athlete, totally different from her skinny boyfriend.

The girl was still a bit reluctant, but eventually the girl did remove her clothes and was now down to her underwear: a matching set of pink bra and panties. The only man who'd ever seen her wearing that before had been her boyfriend, now, Kirito had seen it too. She laid on the bed beside him, and they had a conversation that got more flirty than she first imagined. Kirito was having no trouble wooning her with his unique personality.

And so, once the conversation died out, she knew that the time had come. Forgive me… She thought, thinking of her childhood friend in the real world, as she felt Kirito's hand slowly caressing the side of her belly as they laid in bed. "Kureha…" Kirito whispered, looking at her in the eyes with a loving gaze, making her forget most of her guilt.

The black haired young man then pulled her closer, and kissed her passionately in the lips, finally claiming her as one of his women. Their tongues battled for dominance as the kiss got wetter, they started to wrestle in bed as the make out session got ever more ardent, each one wanting the other's body like it was the most important thing in the world. Each one caressing the other, and rubbing their bodies together, desperate for that affection.

Kirito ended up on top as they wrestled, and as the kiss ended and Kureha opened her eyes, she was mesmerized by his towering figure atop her. It was then that she noticed his enormous, veiny and hard member, it was bulging with anticipation, all of this because of her. Her boyfriend's cock was really small, it didn't even come close to comparing to Kirito's, but this wouldn't be a problem if her childhood friend knew how to use it, which he didn't. He could never satisfy Kureha in bed, she tolerated that because of her feelings, but the truth was the truth, he was terrible in bed.

"Kureha, I know that you still have him, so if you prefer, I won't go any further." Said the Black Swordsman, in an understanding tone. Kureha blushed again, some small part did want for this to stop at once because of her childhood friend, but she couldn't bring herself to do it.

"No…" The girl decided, giving Kirito a warm smile. "Kirito, I want you." Said the girl.

The young man smiled back, and quickly started to help Kureha remove her bra and panties. Now fully naked, she was a bit embarrassed of Kirito staring at her naked form. The girl didn't like to show a lot of skin because she wasn't really confident in her body. She didn't have those toned legs and plump butt Sinon had, nor was she a match for Leafa and Strea's breasts, she was just average, she thought.

"You're beautiful." Kirito commented, starting to kiss her in the neck, making the girl start to moan softly, totally infatuated by that man. She also began to feel his erection rubbing against her moist pussy, dripping in anticipation. She couldn't take any more foreplay, that was driving her crazy.

"Kirito, I need you inside me." She said it in his ear, and as he heard that, the black swordsman got serious. He grabbed her hands with his own, looked at her in the eyes and positioned himself right at her entrance, slowly rubbing his length against her slit. "I'm going in."

The feeling of having that massive cock slowly penetrate her was out of this world. There was pain, sure, as she wasn't used to what Kirito was packing, but the pleasure more than made up for it. Waves of pleasure echoed around every fiber of her being as the man began to slowly thrust in and out of her, not too rough but also not too softly, it was heaven, he wasn't even in the same league with her boyfriend.

As the pleasure increased, so did the intensity of Kureha's moans. "Ahhh Kirito!" His pace increased as he heard her cry out his name. "Yes! Harder! Harder!" She yelled, not giving a damn about making noises, at that time, all she wanted was Kirito's love.

He pounded her like there was no tomorrow, thrusting and thrusting in an increasingly hard pace, Kureha started making a little bit too much noise, so he decided to shut her up with one more heated kiss. And as their tongues once again started to dance with each other, as Kirito started feeling the contractions of that especially tight pussy wrapped around his member, he started to feel his climax approaching.

And without being able to hold back any longer, he buried himself as deep as he could inside her and started shooting copious waves of semen inside her womb, rope after rope of sticky semen, semen that would no doubt knock her up if they were in the real world. Feeling that hot liquid filling her up to the brim, her orgasm came in strong too, and the bliss that ensued was unlike anything she'd ever felt in her entire life.

"Kirito… I'm yours." The girl managed to say, before passing out completely in the bed.

…

A lot of time had passed ever since that time in Underworld. Everyone had been saved, returned to the real world, and the situation was completely normal again. Kureha, immediately after returning, broke up with her childhood friend saying that she didn't see him as anything other than a little brother. He was quite saddened by that, but kept on being good friends with her for a time, although she seemed to grow ever more distant from him. He also noticed that Zeliska too was acting distant.

One day, he'd sent a message inviting Kureha to go out looking for treasures in GGO, it took a while, but the reply finally arrived. Apparently she couldn't go because she and Zeliska had been invited to go out questing with Kirito and his friends, and weirdly made a point about how her friend couldn't go because Kirito was only taking the girls that time.

He was quite sad, but hey, at least he still had ArFA-chan.