The sauna talk mostly revolves around swimming, with some mentions of how to bring it up to impress girls enough to get them interested. You are aware that Cordelia has been very much enjoying watching you swim topless, but she's been enjoying your company even before that, so unfortunately what they have to share isn't useful beyond the reveal that they are being exposed through the steam in the sauna to whatever the coach is doing.
You don't waste any time running to the library. "It's in the sauna! Magic steroids are in the sauna, and I've been soaking in it."
"Oh no! You're going to turn into a fish man!" Willow exclaimed.
"Xander's new, he shouldn't be at risk of changing yet," Cordelia rebuffed. She looked worried anyways.
"Alright, let's grab the coach and shake him down for what he knows," Buffy decided. "We need to see if what he's done has a cure."
"I'll come along. He might go easier if I'm there." Or not. The coach was turning the team into fish monsters after all.
You followed Buffy through the school to the infirmary. The coach was having some kind of argument with the nurse that was interrupted when Buffy knocked on the door. Coach Marin frowned at Buffy and looked over at you. "Something wrong Harris?"
"Just a small thing." You grinned. "I would have liked to get the option of being fishified or not."
"What are you talking about?"
"We know that you're putting something in the sauna that causes the swim team to mutate. It makes them swim better, but they also turn into monsters if exposed long enough," Buffy said calmly.
"I told you you needed to stop," the nurse lectured the coach.
He turned red. "I made them winners! I look after them!"
"Funny, I wouldn't call being turned into a fish monster being looked after," you shot back.
"I don't abandon them!" Coach Marin stepped forward with a powerful scowl. "If you don't want to be part of their dinner, I would drop it. You have a future Harris, don't ruin it."
"Living in the sewers? No thanks."
Buffy and the coach fought. The eerie cries of the fish men echoed up as they fought, responding to the coach's stress. It ached less than the last time you heard it. You didn't know if that was because they were further away or because of the exposure. The coach was knocked out, and you took him back to Giles to get whoever it was that handled humans committing crimes with the supernatural.
Giles figured out a way to undo the concoction, but you apparently had an odd reaction to the magic fish steroids. It's bonded to you different, and they can't undo it. It won't get worse, you won't turn into a fish monster, but they can't one hundred percent clear it out of your system either. Ms Calendar and Giles look you over and reach out to their contacts to see how you're doing, but as far as they can see you are still mostly human. The only change is that you can hold your breath for thirty seconds longer than before, and a trained human swimmer could do longer than that.
There's also a small rash of scales on the underside of both of your forearms, small enough to be mistaken as patches of dry skin unless someone really looks. They get itchy if you let them get too dry. It's hard to not pick at them until it bleeds, a permanent mark of how you've lost some of your humanity.
And you still have to deal with the fish monsters from the team members who changed before you could undo it. There's four of them now, a final one having changed while Buffy fought the coach.
[ ]Leave them, the sewers in Sunnydale are certainly large enough for them to live in, and already full of monsters
[ ]Try to get them to the sea, better to get them away from Sunnydale
[ ]Hunt them, they are monsters that are willing to kill people and a threat
[ ]Try to talk with them, see if you can reach whatever is left of their humanity
[ ]Write-in