Cross-examining Iruka had been less fun than expected. Kakashi had tried to ask the most awkward and humiliating questions he could muster, but the most he got was a blush and a slight stammer. The man seemed very responsible and to-the-rules, which made Kakashi scratch him out of his list of suspects for the pranks. Iruka still was, however, in the Suspicious Chunnin List. Kakashi could tell something was amiss with the man; no one he knew, not even the most devoted of shinobi (Gai included) led such boring lives. His track record showed almost no mistakes and his only fault ever seemed to raise his voice at his students or anyone threatening them. Apparently the scarred ninja went to school, went to the mission room, went home, graded, perhaps read and off to bed at nine. No night life, no hobbies, no lovers, no anything. What a square. Of course if Kakashi had been more bent on studying Iruka than most Konoha chunnin, he might have noticed that he indeed did have a hobby and that recently he had been sneaking out during the night to leave traps for certain jounin he disliked.
"Is that all, senpai?" Iruka asked politely.
"Hn" muttered Kakashi and he went off to stalk his next victim.Iruka let out a hardly noticeable sigh of relief and walked home, unaware that the copy-nin was following him to find out where he lived.

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Both Iruka and Kakashi had been having a VERY bad week. Neither ninja knew the culprit, but they both knew they were being targeted by a prankster.
Kakashi had given up on trying to sort out the missions that came in his inbox every day and was especially cautious when going around the corners and opening closet doors.
Iruka now checked his bed sheet with military precision before going to bed and after three days he managed to get the smell of fish out of his hair. His neck still itched as if there were still dirt fleas in his shirt, though. It did not help Iruka that he had Konohamaru is his class and that the boy took every opportunity to try to trap his teacher and skip class.
Kakashi was dead tired of spying on boring chuunins and he was tempted to make up an offence to report to the Hokage just to end the stupid mission.
"Nothing is out of ordinary dammit!" he yelled at her in his head. He sighed and took out his smutty book, while he let his chakra follow the chuunin instead of his eye. He wanted to relax.The afternoon found him in the Konoha Laundromat. As he turned the page to the ending of his Icha Icha he saw a figure moving towards the door with a huge load of clothes. Feeling polite he went to open the door. A disgruntled chunnin with a scar across his face stared back at him while he was trying not to fall over under the weight of the dirty laundry.
"Oh, it's you", said Kakashi, tempted to close the door on his face, but decided against it, since he had went all the trouble to walk across the room and open the door.
Iruka muttered his thanks without meeting him in the eye and heaved his clothes to the nearest washing machine.
Then he went over to the change machine and slid a 100 Ryo note into it. The machine spit it out. Iruka took the note, smoothed it a bit and tried again. And again. And again. Kakashi watched the proceedings with amusement as the machine remained as stubborn as ever on denying everyone change and Iruka's patience started to run short and his temper high. When the chunnin looked ready to rip the machine off it's hinges and beat the change out of it, Kakashi materialized at Iruka's shoulder."If you need change for that 100, I have some 25", he said casually. Iruka startled, a little uncomfortable with having the man so close.
"Um...yeah, thanks, that would be nice of you", he tried to make his reply sound casual, but it took a nervous edge he didn't intend.
The jounin gave him the change and then turned around to take his own clothes out of the drier. Iruka could not resist looking. Yes, he was washing his underwear, and it was light blue! Kakashi in blue boxers. Iruka concentrated on setting the machine to wash trying not to laugh out loud or let his smile show.
"You're putting all your clothes in one load? No separating colors?" Kakashi was suddenly at Iruka's shoulder again. Iruka was startled out of his mind plan of distract Kakashi somehow and steal his underwear for later blackmail.
"Erm, yeah, that's how I do it." Iruka didn't know what to make of the question.
"If you do that, they all come out looking the same color."
"I don't mind, most of it is dark anyways. Ninja uniform, you know?"
Kakashi just shrugged, took his clothes and left.
"He doesn't seem like such a bad guy after all," thought Iruka, while he sat down to read a magazine while he waited.His opinion changed drastically in 20 minutes, however, when he opened the washer and found out someone had slipped a blood pill in. Everything was crimson red.
"BLOODY HELL!!!" He yelled, because as a school teacher, he felt obliged to restrain his language even outside the classroom.
Somewhere not so far away, a perverted jounin chuckled to himself as he finished his dirty book.