Finn entered the shower room, turned the corner, and there was Junko with his back to him, stripping off his now damp tank top. Finn shuddered seeing the immense spread of his back muscles flexing with the effort, and quickly closed his eyes so other parts of his own body wouldn't be so apparent. He turned to the wall and concentrated on taking off his own t-shirt, trying to ignore the sounds of Junko slipping off his shorts.
"Better hurry up before I use all the hot water!" said Junko cheerily, and Finn heard his feet jogging towards the shower. "Yeah," said Finn, without looking up. "Right behind ya."
Finn had no idea how he was going to do this without giving himself away. He'd already slipped up by suggesting a shower, but now, once he got his shorts off, Junko wouldn't be able to miss his hard on. He just had to hope that his casual act would hold. Finn swept off his shorts in one swift motion, used a towel to cover himself, took a breath, and strode boldly into the shower.
Junko was already under a nozzle, facing the wall, rinsing his bluish green hair. Fortunately the steam had built up enough that Finn couldn't see too much detail on Junko's body, which made him sigh inwardly with relief. Without breaking his stride (or looking at Junko's amazingly sculpted ass), he took a nozzle on the opposite wall, and turned on the cold water, hoping for the best.
Junko was humming to himself, when he paused and said, "So, Finn, how was my form today?"
Finn froze for a moment, then collected himself and said, "Your form?"
"Yeah, you know," Junko said. "My form with the weights. I wasn't arching my back, was I?"
Finn almost said that his back wasn't what he'd been watching, but caught himself in time. "No, no, everything looked fine to me," he said instead.
"Are you sure?" said Junko. Finn sneaked a glance over his shoulder and saw Junko still facing the wall, but arching his arms backwards. "I feel kinda tight." Junko sneaked a similar glance over his own shoulder and caught Finn's eye. "Would you mind rubbing it out for me?"
Finn tried valiantly not to let his eyes bug out of his head and his jaw drop to the floor, but he had no idea if he was successful or not because his mind was reeling. "R-r-rubbing it out?" was all he could stammer out.
"Yeah," said Junko, facing the wall again. He put his huge hands against the wall on either side of the nozzle he was under, and flexed his back to the left and to the right, as if trying to pop his spine. "I just need your hands to massage it a little where it hurts."
Despite the cold water, Finn flushed, swooned a little, and felt his cock get rock hard all at once. Knowing this was probably the worst mistake he'd ever make, he couldn't say no, not only because it would look suspicious, but because this might be his one and only chance of ever getting as close to Junko as he'd always wanted to.
He took the few steps across the floor to Junko's massive expanse of a back, his heart thumping, and said, "So, uh, where does it hurt?"
Junko turned his head and looked at Finn out of the corner of his eye. "Oh, just start at the top and work your way down."
