That first OPM OVA

JESUS CHRIST GENOS YOU EXTREME STALKER

In this OVA alone, Genos:

sets up a tent on the roof of a building to spy on Saitama with a super powerful camera,

begins writing daily observations in volume 1 (out of the current 1098+).

hides behind trees and buildings while stalking observing Saitama,

enters the same restaurant to stalk observe him even more,

takes a fry from Saitama’s plate when Saitama goes to the bathroom,

puts the fry in a plastic bag to analyze it later,

observes stalks him some more,

runs some weirdass hardcore tests on that damn fry (?????),

and finally shows up at Saitama’s door to be his disciple.

Lesson of the day: You will never be as thirsty as Genos is for Saitama.