Omegaverse au where Senku and Gen aren't together but fool around as a way to relieve stress, or during Gen's heat or Senku's rut.
That arrangement has been fine, really, it's not Gen's fault Senku caught feelings, though Gen would say it's not Senku's fault he caught feelings. But if this was the only way they could have the other..... It'll be fine. Really.
One night after being revived in South America, Gen pulled Senku away from the fire and the rest of the KoS, Senku thinking Gen pulled him away from the others, for some naughty time, makes a quip with a smirk "Mentalist you've only been revived for two days, don't tell me you're already getting needy"
Gen huffs a laugh and the frowns. "No that's not it."
Senku's smirk drops and his face turns serious. "Are you okay?"
"it's nothing bad, and I wanna start off by saying, you don't have to do anything or help or anything."
"Gen, what is going on?"
"I'm..... I think I'm pregnant. Actually I'm pretty sure I am."
Millions of thoughts race through Senku's head but they all felt like static.
Gen took Senku's silence as disappointment.
"I'm sorry Senku-chan." Voice small and broken. "I know our whole arrangement was so you can have someone to fuck and relive stress, so you don't need to do anything, but I wanna keep it. Besides you still have so much work to do, a child would just slow you down."
"Gen, I'm not gonna let you do this on your own."
"I think it's best if I do. Senku-chan I..... I love you and have for awhile, before all this started and raising a child together would be too much. I'm sorry I know it's your kid too and you have a right to be in their life, but I just can't......" Gen trailed off as he began to cry.
Suddenly Senku was wrapping him in a hug. "It's the same for me..... It was never just sex to me. For me it was the only way I thought I could be with you. Sure it's not the best timing but I want to do this with you, only you. I love you Gen."
Just imagine Senku dividing his time between making the rocket and sitting on a pregnant Gen and then their child.
























