About These Two Guys
Since we're at it, I came up with some names for them.

Onahole-kun...
Real name: Hiroto. Petite build, a pro-level masturbation master.
The horse dildo slides all the way in. He has a thing for strong guys. Same age as Haru (the bigger guy).

Gorilla-kun
Saito Haru. He's been wrestling with his much older brothers since he was a kid, and lately, even when they team up two-on-one, they can't take him down. But he's so huge that no one can keep up with him in fights or sex, so he's been a virgin all this time.
Obsessed with Hiroto's ass.
For the sake of his precious fuck buddy (Hiroto, the smaller guy), Haru decides to try bottoming for the first time... Haru curls up in agony from the pain.

They call a timeout and regroup... Still not satisfied, Hiroto ends up jerking off with Haru's cock instead...
Haru is utterly terrified of Hiroto all over again. The End.

(P.S. I heard that Japanese dicks are like deadly weapons—small but insanely hard. Is that true?)