The ages of Hanabi and Konohamaru are base off of Narutopedia, which claims that Hanabi is about 10-11 and Konohamaru 11-12. This means (at least in my POV) that Konohamaru should graduate a year before Hanabi. Since her birthdate is March 27 and his December 30, they both will be 11 with Konohamaru nearing 12 (its around fall in the story).
Post Akatsuki
If anyone were to ask what Hanabi thought of Konohamaru, she would say he is a stupid, perverted, Uzumaki-wannabe loser who should whither up in some dingy corner and die, slowly and miserably. And she is NOT saying that just because he is one year her senior, or that because he is already an official ninja, or that because of the Akatsuki attack her class would graduate a year later than they should, and definitely not because by the time she graduated Konohamaru would already have been a ninja for two years!
No, she is not jealous, envious, or anything like that! And you should know better than to say she is in denial!
Well, okay, maybe it bothered her just a little bit.
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Damn it all to hell! She deserves to be a shinobi, not Konohamaru!
I hate him. I hate him so much. Look at him! With his stupid teammates and stupid sensei and stupid D and C ranked missions! Look at him, mocking me with his stupid inflated ego. He thinks he's better than me, does he? I'll show him. Just you wait Konohamaru!
While Hanabi spied on...I mean, observed Team Ebisu from behind the obviously out-of-place bushes, Konohamaru was waving his arms frantically in front of Moegi and Udon. It seemed like he was trying to get them to agree to some kind of self-proclaimed task, and they were getting quite annoyed with him; Moegi was itching to swing her fist right into his face.
Kohonamaru made some dirty comment, and Moegi took this as an invitation to give the loudmouth a good black eye.
Hanabi made a mental note to someday ask Moegi to join her regime of terror.
She knew exactly what she wanted to do with the annoying idiot. Oh, she had many, many schemes made up; it filled a whole journal. But of the hundreds she had come up with, she really like a particular one. It wasn't too harmful, just enough to get him all riled up. After all, it would only be the beginning of her onslaught against the Naruto-mini. It was his own damn fault, really: he chosed to follow the footsteps of someone even dumber and perverted than he is. That Uzumaki brat that her neechan liked of all things...ugh! The blonde wouldn't know a crush if it knocked him out, hid him in a closet and raped him over and over every single day for the rest of his life.
Baka.
Well that's just fine with her.
If Konohamaru wants to be so much like Naruto, then she'll help him look like Naruto.
Later that afternoon, whilst Konohamaru was dragging his feet and hitting rocks, Hanabi, on top of a roof, threw a kunai that hit the ground in front of him, and then quickly disappeared.
"YAHH!"
Konohamaru, believing he was under attack by some missing rogue nin (nevermind that he is in the middle of Konoha), jumped three feet into the air and shifted into a rather clumsy fighting stance. When no enemy came out after several minutes, he cautiously glanced at the kunai and carefully checked it from a distance, alert of the paper attached to it. It was possibly an exploding tag and he should do his best not to get too close.
After realizing that the paper was not an exploding tag, Konohamaru relaxed his stance and approached the kunai, curious as to what the message said.
Konohamaru tore off the paper and pocketed the kunai. It was neatly folded and plain, and had his name written on it, but no indication of the sender. He unfolded the paper and read the message:
Konohamaru,
Meet me at the top of Hokage Mountain at 7:00 p.m. sharp. I'm going to teach you a new and super cool pervy technique.
~Number one shinobi and Future 6th Hokage, Naruto Uzumaki! Dattebayo!
PS: Don't tell anyone about this super secret meeting!
Konohamaru became giddy and excited. A new pervy technique? Awesome!
It didn't occur to Konohamaru that Naruto was currently on a mission, or that Naruto never sent messages like this, or that Naruto was about as punctual as a snail and most likely didn't even know what the hell p.m. is. But logic escaped Konohamaru just as easily as it escaped the ever-famous blonde Kyuubi vessel. The spiky brown-haired Genin almost literally skipped home to take a quick lunch and put in a little training before the anticipated meeting with his teenaged role model.
"Hey Naruto obayo, I'm here, kore!"
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"NARUTO! BOSS!"
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"Hmmm, I bet he's late 'cause he's training to be strong! Naruto is so strong, he's definitely going to be Hokage someday!"
As Konohamaru continued on to praise his idol, he was unaware of the two figures hiding behind the obviously out-of-place trashcan.
Whisper "Ready Kuri?"
A squeak.
".....go get him."
Chchchchchcht!
"Uwahh!"
Hanabi waited a few moments before she leapt out, rope in hand.
"Why hello there, Konohamaru. Remember me?"
A scratched up Konohamaru looked up with fear in his dark eyes, as he stared into pale ones that were laced with vicious intent.
"mhmmmf!"
"I'm sure you do, you only try to annoy me at least once every other week!"
"mmph!"
"Well you're not going to forget my face anytime soon, loser. I've got many things in store for you."
"........"
"By the way, how's the Uzumaki moron?"
Konohamaru started to struggle from his binds.
"You really do look up to him, huh? I bet you want to be just like him."
"Mmmmphf!"
"Well, guess what? I think I'm gunna help you with that."
As she spoke, Hanabi circled around the trashcan. She gave a swift sharp kick to the tin, knocking it over and revealing the contents that she had picked up for this plan.
"!"
"TIME FOR A MAKEOVER!"
"!!!!!!"
Konohamaru swung from a lamp pole, still struggling from the invincible rope knots that kept his arms to his side; his own scarf was used to prevent him from spitting the wad of cloth in his mouth.
Among the crowd of curious civilian villagers and a few young ninjas, Konohamaru's teammates and sensei stared agape at the unexpected and strange sight.
He had small scratch marks and tiny bite wounds all over. Someone had drawn whiskers on both sides of his cheeks and a crude picture of a........male private part......just below his right eye. He was clad in nothing but bright orange boxers with ramen patterns. His crop of spiky brown hair was now a mess of highlighter yellow (that's right, the obnoxiously bright glowing yellow and yellow-green that is associated with highlighters).
Anyone with half a brain could tell whom Konohamaru was supposed to look like.
"Uhh, Ebisu sensei?"
"Yeah?"
"Shouldn't we be helping him?"
".......maybe."
"I mean I think he's been there all night..."
"Maybe we should just go get breakfast, Moegi."
"Hai. We'll see you at the training grounds later, sensei."
"Bye, Moegi, Udon."
Eventually, Ebisu let Konohamaru free.
The boy, or anyone else, never mentioned anything of the incident.
The night before at the Hyuuga compound, anyone with a document in hand and in need of the bright yellow markers wondered how could all the brand new highlighters in their homes have gone dry so quickly.
Naruto never noticed the missing pair of boxers until a few months later, when Sakura finally got fed up of his stench and demanded that he do laundry.