Disclaimer: I do not own Katekyo Hitman Reborn.
Who the exact culprit was, was something Tsuna could not decide. None of his guardians were entirely above suspicion, he had even considered the Varia whilst trying to pinpoint who exactly had left this order form on his desk. Any orders for machinery and products had to go through him, one of the many joys of him being a mob boss. There was no signature on it, no clue as to who had printed off the form. But then thought Tsuna, who would want to own up to wanting a large order of this product.
Tsuna had initially suspected Mukuro, but he was still in the Vendice penitentiary, and he could not understand why he would possess, or ask even ask Chrome, to place an order for this product if he was unable to use it, and besides he had his illusions. There was no way Chrome would want this. If there was one thing Tsuna was sure of, none of the girls had left this order for him the check through. Of course, whilst suspecting Mukuro, Tsuna had also considered Ken and Chikusa. But this thought was blown out of the water when he realised they would never buy order anything from the Vongola that could potentially leave them in debt with them. Mukuro would hate that.
After Mukuro, Tsuna turned his thoughts towards Yamamoto and Gokudera, they knew that he knew what they were up to, but they all kept quiet about it, and Tsuna was sure that Gokudera would realise that if Tsuna ordered this for either of them, people would begin to suspect something, and Gokudera would hate that. That left Ryohei, Hibari and Lambo. Ryohei was dating Hana, he would have no need for this, Tsuna hoped. Lambo was still far too young to understand what this order was about. Unless, he did know and decided to order a batch of it for some kind of practical joke, Tsuna couldn't deny that it was a possibility. Hibari, well, if Hibari wanted this stuff he would have ordered it and paid for it through the Foundation's budget, and Tsuna was pretty sure Hibari would have no need of the stuff, unless he used it for some other weird reason such as shining his Tonfa's, highly unlikely in Tsuna's mind.
So next on his list of suspects were the Varia. Xanxus was defiantly not a suspect, there was no way in hell that he would order stuff through Tsuna, and Tsuna wouldn't even know how to approach him if he was the culprit. With Xanxus out that also took out Levi, who wouldn't dare defy his boss. It was unlikely that Fran was behind this, although Tsuna didn't really know him so he couldn't really say, but Fran was less likely than certain other members of the Varia. Belphegor could have possibly done it. He had been at the Japanese base last week, and he had placed orders under the Varia budget for rather obscure things before. It could have been Squalo; there was a distinct possibility that he used it to prevent his false hand rusting. Or not. Lussuria was probably the most likely out of all the Varia to drop and order form on his desk, but he was sure Lussuria bough any items he needed himself, and why would he bother Tsuna with something like this?
Tsuna sighed and glared at the order form. It could have been Reborn, it seemed like the kind of underhanded trick his ex-tutor would do to test him. Although if it was Reborn, Tsuna could not fathom why he would set this as a test, so maybe it wasn't Reborn. He was certain it wasn't Shamal, Bianchi, Fuuta or anybody else in the base who had left the order form, or would even have want of it. The other options Tsuna found himself left with after failing to deduce the culprit were:
a) Someone ordered it for a joke whilst they were drunk,
b) He place the order for it and had no recollection of doing so, or
c) One of the box animals escaped. Walked over his computer keyboard and somehow managed to print off an order form for this.
All highly unlikely in Tsuna's mind.
So this left him with the question,
"Who the hell ordered 100 tubes of lube?"