Heroic Betrayal

Mutagen Genderbending + Lemon

A/N Hello everyone and welcome back to another chapter of Heroic Betrayal! I hope you all haven't been waiting for millions of years for this story to come back onto this platform with a new chapter! I was focused on other things building up to today and I couldn't give this story the attention that it needed. Not to mention that I will be much better in terms of writing this story now that I got the experience for it! Let's begin! 

(P.S Couldn't find any mutagen puddle images.)

Izuku and Ochako were deep in their sleep when the Mutagen above Ochako's head began to drip onto her face. Slowly rousing her from her slumber, she opened her eyes to find a very concerning sight as there was a weird fluid dropping from their ceiling's vent. It kept dripping on her face causing her to rub at it before she shook it off and climbed out of the bed. Moving to use her quirk to lift her to the vent to see what the problem was, she got very close when it broke apart bathing her in it. She let out a small yelp from how the sludge like Mutagen covered her entire form and with it mutating her body into something resembling an Anthropomorphic animal.

The scream that Ochako gave woke Izuku up immediately as she got up from the bed in a hurry only to find something horrifying. Ochako's body was completely covered by the Mutagen, that had somehow gotten out of Principal Nezu's own clawed hands. Pulling Ochako out of the Mutagen, Izuku did her best in order to salvage the situation as Ochako was whimpering in her arms. Pulling Ochako onto her shoulders, Izuku ran out of the room in order to get to Recovery Girl, the old nurse would know what to do. Rushing through the morning breeze, Izuku made sure to keep Ochako from getting cold as she'd placed a blanket over the girl as she whimpered. 

About 5 minutes later, Izuku found herself sitting in Recovery Girl's office as the old woman gave a once over Ochako. She kept at this until it was later on in the morning, with the sun rising over the horizon as Recovery Girl just sighed. Looking at her Izuku gave her a questioning glance as Recovery Girl just shook her head before pointing at Ochako. If there was one thing that Izuku knew about Ochako it was that if he could remember her last night... she had breasts as well as some thick thighs. But now? She looked more masculine, had muscles on parts of her body that she didn't even know existed, and was looking like a Squirrel. She did not look like that last night, before they went to bed at least... but at least this gave her the answer she had about Ochako in the past. Her spirit animal was a Squirrel.

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As the two returned back to their shared bedroom, considering the fact that they couldn't show Ochako to the rest of the class as of yet. Aizawa had come knocking on Ochako's door as the man had heard about what had happened to her from Recovery Girl. Izuku let him in on the pretense that he wouldn't inform the rest of the class until Ochako was comfortable with her new form as well as body. When he informed the two that they didn't need to come to school for the remainder of the week to get Ochako up to date with how to use her free limbs now, he left. 

"So, what do you think we should do now?" Ochako asked, her once beautiful voice now a masculine baritone. "I-I don't know, I've never witnessed anyone else become a Mutant from Mutagen before." Izuku said, as her tail swished back and forth. "Well we might as well lay down next to one another for the time being." Ochako said, as 'he' now pulled Izuku into his exposed chest. "Um, are you planning on doing anything?" Izuku asked, as Ochako placed his arms around Izuku's abdomen. "No, just want to get the sleep we didn't get earlier this morning." He said, before falling asleep.

Izuku just sat there with an expression border lining on exasperation, Ochako was taking to this very well. Considering the fact that it took Izuku about a week and a half in order to get his working limbs under her control? She thought that Ochako would be at least somewhat concerned about what she would look like to the public. But the simple fact that Ochako seemingly wasn't worried in the slightest? That was very concerning for Izuku as she stewed on those thoughts until she felt something poking at her rear. Reaching an arm around her back to move the offending limb away from her rear... she felt something that really shouldn't belong on Ochako. A bulge was poking into her rear, and for some reason that bulge was really big... and for some reason, again, Izuku couldn't find it in her to actually care in the moment.