He very well could have sent a random shinobi to inspect, he very well could have, however, his common sense acted faster than him, sending him to stand up and take the road to the small compound where the Uzumaki lived.
It's not like visiting Naruto would be a big deal, it would just be an ordinary day for him, go, knock on the blond's door, make sure the place was clean and then hand him 50 yen dollars to survive, though he didn't even know why he kept doing it, after all, Naruto was a genin now, he earned his own money with clean work and effort.
To say he had faith in the boy was...a fallacy, honestly, he didn't expect much from the young shinobi, rather, it was surprising that he even graduated from the academy.
Although he was at the hands of Iruka, he could expect nothing less from his best teacher.
In fact, the relationship between the two, despite having started off on the wrong foot (and by left foot he meant; jokes, jokes, interruptions and running away in the middle of class, the classic Naruto with any authority that demanded respect) developed quite well, something fast to tell the truth, both began to go out to eat ramen to Ichiraku after at least two weeks of having met, Naruto accompanied Iruka to the market, and whenever he had the opportunity, he joined him on a walk to who knows where, you could even say that they had a dynamic of father and son quite palpable.
However, as far as he understood, parents don't fuck their children OR, they shouldn't do it.
His common sense lifted him from his comfortable stay in the office, forcing him to leave the premises, while declining any "company" proposed by any ANBU or shinobi that would cross his path, this was one thing he liked to do alone.
And he thanked God that he came alone.
It didn't take him too long to reach his destination, of course, after he had greeted most of the people in town who paid their respect to his figure, with bows, flowers or compliments from pretty old ladies all around him. He climbed the stairs and held on to the railing, his path being dimly lit by the receding horizon of the sunset to welcome his sister; the night (or perhaps, simply, his impossible love).
The cold breeze replaced the cool one in a couple of minutes, minutes which Hiruzen used to reach the door of Naruto's apartment.
He knocked three times, and not perceiving any answer, he just opened the door carefully, knowing that the boy did not usually leave the door closed (he supposed it was because he had forgotten where he left his key).
To his surprise, the place was spotless, free of any dirt, there was only an empty bowl on the table in front of the sofa where there was...a TV, when did Naruto buy a TV, how was it possible that he hadn't spent all his money on ramen?!
Oh, yes. Naruto had grown up, not enough to stop being an idiot, but enough to know how hard it was to get money and that to fulfill his needs, however basic or whimsical, he had to work for it.
Hiruzen wrinkled his nose in disgust...he knew that smell...was it...testosterone?...?
Yes, yes it was. His ears pricked up, trying to hear more clearly a muffled sound coming through a wall (or should he just peek out to see what was going on). Suddenly, nervousness possessed him in a sigh, maybe he should just turn around and leave, but that sound...that was not Naruto's voice.
"Ngha," a splash was suddenly heard and the third one's eyes snapped open.
Flap, flap, flap.
He would recognize that thumping of skin against skin wherever he went.
He slid against the green wall to the wall connecting the place where Naruto's bed was and there he saw it.
Pederasty in all its expression.
"Ah, ah, ah, ah," the young genin's tanned, shapely body remained submerged beneath a naked, tanned anatomy, brown hair mingled with blonde locks as fingers of different shades joined in a mid-pleasure manifestation of love. Naruto's hips were raised against Iruka's pelvis, which gave the distinct impression of penetration, the brunette's movements were anything but slow, frantic strokes bursting against the jinchuuriki's buttocks, his irises rolling back until his eyes turned white.
Musk dripped from the younger boy's anal sphincter as Iruka plunged his penis even deeper inside him, butterfly kisses were scattered all over the boy's face, one hand of the brunet sneaking between his legs to caress Naruto's small member.
"I-iruka-sensei!" Sarutobi was elated, surprised that Naruto would choose to continue to use the title "sensei" on Iruka despite the context....
But anyway...
What the fuck was he watching!?
Should I interrupt?, yes, yes I should!
-"....I love you," when the hokage was ready to open his mouth to call out, a muffled exclamation interrupted him, interested, he fixed his gaze on both bodies, trying not to descend further than Naruto's red and sweaty face. "I-I love you..."
The boy said suddenly and Iruka's eyelashes dropped suddenly, giving him a warm look, the thrusts seemed to slow down and the boy's face, previously wrinkled in pain, softened, a French kiss making its way into the scene.
"I love you too, Naru". Iruka's mellifluous tone churned the bijuu vessel's stomach, as did his inaudible orgasm"now, baby," Iruka rubbed the erect organ "come for daddy."
"Ough~!"
Hiruzen turned around and walked away.
~~~~~
Two weeks have passed since his... finding, and he can swears that since then he hasn't been able to look either Iruka or Naruto in the eye, and who could after seeing that scene?, the discomfort still gnawed at him brain at night and the spasms produced by the sound of the voice of either of the two protagonists of that sex act were horrendous.
He was seriously considering whether to send Iruka to jail for fucking underage boys
However...
He'd been watching the couple from the shadows ever since and there was always something else in the way they looked at each other....
And it was love.
Romantic love, not simply sexual, when Naruto looks at Iruka his irises...they light up, they light up like those of a hungry puppy before a plate of hot, freshly made food, let alone the way Iruka looks at him...it's as if Naruto was the most beautiful thing in the world, a treasure, pure gold placed before him on a silver platter.
Maybe he could let it go....
As he walked, wet sounds made a slight interception between his train of thought, coincidentally, next to him was Iruka's classroom, he turned the knob to confirm his suspicions that it was locked and chuckled under his breath, slamming his fist against the door with the intention of interrupting his moment.
"Iruka, Naruto, please don't be so noisy, remember that you are not alone here."
A gasp could be heard and a laugh manifested out of his throat.
Yes.
He would definitely let it go, he was already looking forward to seeing the anguish on Iruka's face when he went to confront him tomorrow.