(Author's notes: I do not own One Punch Man or Monster Hunter. I own nothing but the story and the OCs.)
Prologue
(After Saitama finishes Boros) "Whew. That was interesting." Said Saitama as he walks through the now grounded spaceship. "Now how do I get out of here?" The bald Hero asks as he looks around. Then something shiny catches his eye as he walks about. "What's this?" He asks as he squats down to pick up the orb. "I'll have Genos look at it" He tells himself as he gets up. Saitama looks around once more. "Oh well" he sighs. "I guess I'll have to punch my way out." He walks up to the closest wall and lightly punches it.
Genos POV
As he is running up to the side of the ship, his sensei punches a hole from the inside of the ship and simply walks out. "Sensei!" shouts Genos. Saitama looks over at Genos while completely ignoring Tornado/Tatsumaki. (A/N Whatever one you feel like calling her.)
3rd person view
Later at the apartment and after Genos gets his arm fixed.(A/N I didn't feel like writing the scene because I'm pretty sure that 99.9% of you know what happens.) "Hey Genos." "Yes sensei?" "Could you look at this?" Saitama asks while holding out the sphere. "Sure." Genos said as he took the spheroid from his hand. He lifts it up to the light and looks at it as the light shone through the stone. "It appears that it has a crystalline structure to it, the crystal has a pinkish purple coloration to it, and the orb emits a faint light." He explained. "Genos what did I say about long sentences." Genos bowed his head as he sighed. "Not to use them." "Now what were you trying to say" he questioned. "It is a crystal, it glows, you can see through it, and it is pinkish purple." explained Genos. "Do you know what it is made of, Genos?" "No. I would have to run some tests to tell. Oh and by the way where did you find this?" "I found it in Boros' ship." Saitama simply answered. "Who is Boros?" Asked the cyborg "Boros was the boss of the ship." answered Saitama. "Oh, well I'll run the test now." said Genos as he pulled a drill out and put it against the orb. "Why are you using that drill?" asked the Hero standing behind him. "I need a sample of the crystal for the test." He answered. "Oh okay." said Saitama as Genos turned on the drill.