At night, when Genos and Saitama are washing up after dinner.
Genos: Sensei?
Saitama: Yeah?
Genos: Did it hurt when you fell?
Saitama: When I fell from the moon, you mean? Nah, just gave me sore knees.
Genos: That's not what- wait, do you still have sore knees?
Saitama and Genos round the conversation out to Genos giving his sensei a massage around his knees. Saitama is relaxed and he knows it's the perfect chance.
Genos: Sensei, may I live in your shoes? Because I want to be with you every step of the way.
Saitama: *gentle snore*
Genos: Tomorrow then.
****************
The next day, Genos and Saitama are on a walk around town.
Genos: *fiddling with his phone when he gets an idea* Saitama-Sensei, I think there's something wrong with my phone.
Saitama: What's wrong?
Genos: You're number's not in it.
Saitama: That's because I don't have a phone, dude.
Genos: That's not- never mind.
****************
Genos and Saitama are eating noodles at an udon shop.
Genos: Sensei, you make my heart catch fire.
Saitama: Dude, that's not good, maybe you should call your doctor about that.
Genos: What?
Saitama: You're not supposed to catch fire, let's go see Dr. Kuseno.
Genos: ...yes, sensei.
****************
Genos: Sensei, you have to tie your shoes, I don't want you falling for anyone else but me.
Saitama: I wear boots, Genos.
Genos: *long suffering sigh*
****************
Saitama and Genos are at a hero party, dressed up and fancy for the locals and their fellow heroes.
Genos: *leaning over to whisper in Saitama's ear* Saitama Sensei, what does it feel like to be the most beautiful person in the room?
Saitama: *thoughtful* I don't know. Hey Mumen, what's it like to be the most beautiful person in the room?
Mumen: *blushes and stutters*
Genos: *internal screaming*
****************
Genos: Sensei, are you the moon? Because even when it's dark, you still seem to shine.
Saitama: ARE YOU CALLING ME BALD?!
Genos: I'm calling you hot, Sensei.
Saitama: Oh cool, I love how guys can just compliment other guys, you know?