The summer sun beat down on the Bonlender high school baseball field with a sweltering heat as the shrill cacophony of cicadas could be heard in the far distance. Sweat rolled down Alex’s head and dripped onto her already soaked uniform top. Her coach had her practicing as a shortstop in their friendly practice game where she stood between second and third base with her legs spread apart and her knees slightly bent as her burdensome breasts swung from her chest, ready for whatever came her way. But despite physically appearing attentive, mentally she was a sputtering clusterfuck as her mind did mental gymnastics trying to justify everything that had happened these last few months on top of her recent developing thoughts and feelings.

Just a little over four months ago Alex had been a boy but one night he woke up in a cold sweat with unbearable pain coursing throughout his entire body. His parents rushed him to the hospital where the doctors discovered he had an incredibly rare genetic disorder which had only affected 27 other individuals since its discovery, Acute Hyper Homo Sequential Hermaphroditism. Or in other words, his body was going through a sudden sex change which had no cure nor any way to alleviate the excruciating pain throughout his nearly month long metamorphosis. His bones and body mass were reshaping themselves to transform his male body into a female one. He lost some overall height, fat redistributed across his hips and chest, his body hair fell out, and his genitals slowly inverted into his body and remodeled into a fully functioning vulva and uterus. Only two days after being admitted to the hospital Alex appeared androgynous if you ignored the F-cup breasts he had developed in such a short time. This baffled his doctors who called every other hospital that had had a patient with Alex’s disorder and by the time Alex's breasts had grown to L-cups they had found their answer. Alex had a rare mutation of Hyper Homo Sequential Hermaphroditism which appeared in only 10% of people with the genetic disorder, making him the third ever person to have it. This mutation caused idiopathic hypermastia which meant that for an unknown reason his rapidly developing breasts would end up weighing between 30 to 50 pounds each. His doctors had brought up breast reduction but with Alex’s parents insurance not covering a genetic disorder this rare (even with the hospital taking a cut off their total bill for allowing his case to be used for further research) they simply couldn’t afford the surgery. After a month of his body painfully feminizing itself Alex awoke to no pain. At this point he looked completely different, almost as if he was his own twin sister, and the hypermastia had left him with breasts both the size and weight of an average sandbag

With the genetic disorder having finished its changes on him he was released from the hospital and allowed back into school. To prevent confusion and the general awkwardness of his sudden sex change they reintroduced him as a new student with only his teachers and closest friends knowing what really happened. His small knit of friends, despite teasing him, were rather supportive with some even offering to put any potential creeps in their place if need be. The teachers and faculty were another thing though as although most were rather helpful and understanding his plainly ridiculously massive mammaries proved to draw a lot of unwanted attention which meant he inadvertently distracted the class with his very presence. But even that was better than the creeps, his peers and some teachers alike, who started trying to hit on him and solicit various lewd activities with his abundantly generous assets. But despite that, and getting accustomed to some bodily changes that come along with being a girl, things didn’t feel too different than before. He still went to the same school, reapplied to the baseball team (although now he played on the girls team), and he still hung out with his friends and got to be one of the bros. 

In fact, Alex found it hard to think of himself as a girl except when his changed body made it so glaringly obvious. Especially with the help of his closest friend, Nate, who tried his best to make everything seem normal and kept an open ear for Alex to vent about the difficulties he faced with his new body. His back always hurt, he could feel the stares of both guys and other girls alike fixated on his breasts, periods and hormonal changes were a completely new beast to handle compared to male puberty, and finding anything that covered his chest was a nightmare! In fact Nate was the only person that things felt normal around. His other friends would tease and joke with him and his parents were too worried about Alex’s sudden change that it all felt like a constant reminder. Now Alex didn’t know if it was the change in hormones or something else entirely but he quickly found himself having… complicated feelings about Nate. I mean, he was a guy right? And he didn’t consider himself to be gay but… It was hard for Alex to shake the image of being swooned over or even kissed by Nate. Hell, Alex found himself daydreaming about first date scenarios with Nate during a boring math period just a couple of days ago. Maybe it was just the sudden change of hormones coursing through Alex’s body that was causing him to feel this way. It was the only thing that made sense.

“It’s heading your way Alex!”

“What?” One of her teammates shouting in her direction brought Alex’s attention back to the present. But before Alex could reacclimate to her surroundings a baseball struck her right in her left boob and bounced down to the ground. “Ow… that kinda hurt…”

*BWEEEE* Coach Morgan’s whistle cut through the air as he ran into the field waving his hands in a cross motion in front of him signalling to stop. “Freeze! Alex, follow me to the sidelines and Sarah, take over as shortstop.” He signalled for Alex to follow him as the rest of the team repositioned Sarah as shortstop. Once clear of the field Alex could hear the usual scuffle of baseball begin up again behind her. “Alex,” Coach Morgan stopped and turned towards Alex, “I can’t keep having you get distracted during practice. I know changing teams and all that must be difficult but I can’t keep letting it slide. It’s not fair to the other girls.”

“I know coach! I won't let it happen again!”

Coach Morgan shook his head. “Sorry but I can’t let you off with a warning this time. This is the third one this week so you’re gonna have to run a mile before I let you go today.”

“But coach I-”

“I don’t want to hear it! If you want to leave before sundown I’d recommend starting now.”

“Fine!” Alex pouted as she stomped her way to the track on the other side of the fence which separated the baseball field from the half soccer field half track. She looked over her shoulder to see her coach keeping an eye on her, she wasn’t getting out of her punishment easily today. “It’s just one mile. How bad can it be?”

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“Uggghhhh….” Alex moaned as the door leading to the locker room slammed shut behind her. It turns out that running a mile could be pretty bad especially as she hadn’t considered how much she had changed since last running one. Her poor back and tits ached from how much they bounced while running. And, yeah playing baseball left her sore as well but she was only expected to run short distances or get a ball or two bludgeoned into her chest. Running a whole mile in the summer sun with nearly 100 pounds bouncing and swaying from your chest was a whole ‘nother beast. “I need to let these puppies breathe!” She lifted her shirt, now transparent and drenched in soak, before reaching behind her back to unclasp her bra and peel it away from her sweaty skin. “That’s much better!” She tossed the bra down onto a nearby bench and began undoing the lock to her locker. “26… 18… and…” She turned the dial  one last time so it was resting on 47 and pulled down on it but it wouldn’t budge. “Huh? Am I at the right locker?” She looked above her and barely eligible was a sticker which read ‘205’. “Yeah. Maybe I didn’t input it correctly. 26… 18… and-”

“Alex?! What are you in the boys locker room?” A voice suddenly spoke from outside of Alex’s vision, startling her.

“AGH!” She jumped and turned, sending her unsupported mammoth mammaries bouncing and jiggling. Standing at the end of the row of lockers was Nate who was still in his sport uniform except he sported a sweat towel draped over his shoulder, an obvious blush across his face, and a tent in his gym shorts. “I- ugh… I- What do you mean? I’m ugh…” Alex stammered, her face growing a bright red to match Nates as she tried to wrangle what little modesty she could of her exposed chest into her arms.

“This is the boys locker room.” Nate pointed behind him at the sign above the locker room entrance. Lo’ and behold she was in the boys locker room, something she must’ve done out of habit from before she was a girl.

“Lemme just-” She bent over to pick up her discarded bra which caused one of her tits to spill over her arms and dangle in the stale locker room air. Her face grew even more red, surely she couldn’t maskher embarrassment with her recent exertion from practice with how obviously flustered she was at the moment. Meanwhile she noticed that Nate’s eyes almost never left her chest, his gaze following the arch her swaying boob had taken. “Do you… Do you like them?”

Nate didn’t answer. Instead he turned his head away from Alex and meekly nodded.

Alex didn’t really expect this response which shocked her for a moment before regaining her composure. “Well… Seeing as you’ve already seen them h-how about I make up for coming into the wrong locker room.” Her world felt as if it was spinning around her, ready to throw her to the ground as she silently panicked. “Why did I say that!? What was I thinking!?”

“Wha-? I don’t think I’m following.”

Alex sat down onto the locker room bench and pointed at Nate’s crotch. “I-I mean I caused that so I guess I have to deal with it now!” She hoisted each of her breasts from her lap and patted for Nate to lay down across her lap. “I’m being so stupid! He’s never gonna-” Nate sat down next to her on the bench and shimmied his way under her lifted breasts so he was laying flat on his back across her legs. “I- ugh… Are you okay with this?”

Nate simply nodded and quietly squeaked out, “They’re so much bigger from down here.”

Alex couldn’t help but smirk at his comment, a sense of pride fluttering in her chest. “Do you like them?”

Nate quietly nodded once again.

Alex gently lowered her breasts down onto Nate which elicited the tent underneath his shorts to twitch. “I-I guess I’ll deal with that now!” She wrapped her fingers under the band of Nate’s pants and boxers and lowered them down his legs, exposing his stiff cock to the stagnant locker room air. She gingerly grabbed it in the palm of her hands, her sudden touch causing it to react. With her hands firmly around Nate’s cock she noted how warm it felt, how it throbbed as blood coursed through his erect member. She wanted to make him feel good. She began stroking it, slowly rubbing her thumb over the gland which caused Nate to squirm and let out soft, barely audible gasps. On the other hand, her left hand sat planted on the bench by Nate’s head with nothing to do. His warm breaths against her sweaty breasts gave her an idea of what she could do with her idle hand. She scooped his head up, running her fingers through his damp hair as she pressed his face squarely into the nipple of her left teat. “Go on~” 

Nate obliged, opening his mouth and gently suckling on his best friend's engorged nipple. Its massive size practically filled his entire mouth but the stiffening of Alex’s back and the pitiful moan she let out told him that she too was enjoying this. Her soft hands which teased his dick felt so much better than when he masturbated and with the combined divine pillows of breast tissue shoved into his face he quickly found himself reaching ejaculation.

“I see you liked that~” Alex cooed as the cock in her hand spasmed, releasing a fountain of semen onto her fingers. But her sense of pride rapidly deflated as she realized what she was doing. “B-but! You’re gonna have to take me out for dinner before I do this again.” She paused. “Not that we will do it again! But not that we can’t do it again! I mean- Agh!” She stood up and stormed out of the locker room, leaving a very confused, lovestruck boy and her sweaty, unwashed bra behind.