If you'd say pre-petrification Ishigami Senku that he would be dating a mentalist after the world became stone, well, he would be fucking laughing at your face... ah but it turns out, that he's the one being laughed off by life in general, as a certain bicolor haired man kissed his cheek before skipping out whining "Senku-chan is such a slave driver, not even sparing me, his precious boyfriend~ So ean-may" as he went to do his assigned task, leaving the scientist preparing himself to do some pots in a quiet place far from the village. He really didn't like to be interrupted or asked many questions and that's why he chose to isolate himself, out of reach, further into the woods.
As he walked away, his mind started getting filled with thoughts, the things he needed to get done on time, procedures and some new idea here and there but, it was when his mentalist's face came into his memories that Senku was painfully reminded of how little time he spent with the man, and it wasn't his fault but somehow, he recalled seeing Gen's longing expression being threw at his direction multiple times and honestly, it made him fill a little but guilty, even if they clarified that, due to humanity not being restored, their relationship wouldn't be a priority.
That didn't mean he wasn't craving some physical contact with that fake magician. Yes, they've kissed, held hands and slept together (only sleeping though, nothing extra), but there was something missing. Gen was being so patient, the ever-efficient right-hand man. He would always ask what was needed, collaborate in strategy and try to be helpful even if the mentalist wanted to cover that kindness up with his fake personality façade.
He shook himself up and went straight to business, sitting in the ground and starting his pot making right away, his hands knowing by now what to do without even paying close attention.
Senku went away for a long time, a few hours, at least five pots before stopping and setting aside the last one.
Just when he was about to stand up, his lower half touched the base of the wood he was using for the molding, and Senku felt his face going red at the pressure that thing was putting on his crotch. Damn it.
He gulped, trying to ignore how good that little accident felt but he couldn't help it. Senku wasn't a big fan of self-satisfaction, not even in modern times, but now, 3700 or so later, his body was calling him out of it and worse than even because, he knew there was someone in his life, who'd be delighted to try and make him feel good but, they weren't even on second base yet... ugh, what to do...
Suddenly, his mind drifted to the big tree beside the lake, huge roots sprouting above the ground and a terrible idea popped in. Well, he needed to release quickly and forget about it, besides his hands were dirty, this wasn't something to get pleasure out of but a physical need. Right, don't think about it and do it fast before anyone comes here looking for you.
After putting the pots on his makeshift bag and cleaning up so he could leave the place after what he was about to do... Senku walked to the tree's roots and kneeled before one of them, the biggest. He lifted his tunic, so the fabric of his fundoshi would be the only thing between him and the branch. Hands on the ground and body accommodating itself to the root, he started easy, moving his hips just a little bit, jolting at the pleasure of finally giving in.
Senku was idly humping, shivering every time he pressed himself with intent, feeling the tip of his cock starting to drip pre-cum on his undergarments and that, that wasn't something he should be getting hornier to.
Suddenly, a thought. What would Gen think if he saw him like this? Humping a tree like an animal in heat... would the mentalist make fun of him? Would he feel secondhand embarrassment, or be angry because Senku prefers to fuck the ground instead of coming to his boyfriend or... maybe Gen would find that hot... ah, the prospect of being attractive like that to the mentalist sent him spiraling down.
