When Saguru tried to be a good samaritan, he didn't expect this. It started when Kaito fell in a koi pond, which was unexpected, to say the least.
"You okay," he questioned gruffly as he pulled Kaito up and out of the water.
Kaito stared at him with wide eyes for just a second, before it was eclipsed by his typical beaming smile.
"I'm good!" he proclaimed, "no need to worry about me!" he just laughed it off, even if he really was unsettled.
After that, nothing really changed, until Aoko decided to bring a fish as payback for covering her in glitter two days ago.
Without a warning, Aoko whipped it out in front of Kaito and Kaito's mind went into overdrive.
'Getaway, getaway, getaway!' his mind screamed at him. Then he saw Hakuba entering the room in the corner of his eye and his thoughts abruptly switched tracks.
'Hakuba! Hakuba safe! Hakuba saved Kaito from the finny things!' and he twisted around, vaulted over a desk, and cowered behind Hakuba, his face buried in his back and hands gripping his shoulders tightly.
Now Hakuba, Hakuba was confused, as was everyone else. They knew that Aoko sometimes liked to punish Kaito with fish, but this was extremely out of character for the magician.
Hakuba decided to ask Kaito, "Um, Kuroba? Why are you hiding behind me?"
"F-finny things" he whimpered.
Hakuba looked helplessly at Aoko, and her befuddled expression stayed as she put the fish away.
"Kuroba, the fis-finny thing, is gone," he said quietly to the sacred magician.
As soon as he said those words, Kaito's personality switched again and he was a blushing, embarrassed, mess behind his poker face. He quickly jumped away and refused to talk about what happened for the rest of the day.
It didn't stop there, every time there was a fish and Hakuba, he jumped behind the latter and stayed there 'til it went away.
After half a dozen occasions, Hakuba decided to confront Kaito about the problem. He got Aoko to give him the address and marched over there without even thinking of Kaito being KID. In fact, he hadn't really thought about KID since this whole thing started.
When he reached the house, he walked right up to the front door and rang the doorbell. Kaito was confused, who was at the door? If it was his mom or Aoko, they would have just barged in and done whatever they wanted. He eventually decided that it might be a door to door salesman and pasted on his best 'I don't really want your stuff but I'll pretend to so you go away' smile.
Then, he saw Hakuba. And he immediately slammed the door in his face. After gathering himself, he opened the door again.
"What do you want?" he asked in a flat tone.
"To ask you some questions" he declared.
Kaito sighed "How many times do I have to tell you! I'm not KID!"
Hakuba smirked, "That's not what I'm asking about" as Kaito sputtered, he walked past him into the house.
He picked up some details as he walked down the hall into the kitchen and sat down. Like the fact that there were about ten vases with dozens of roses in them, in all colors of the rainbow. And the fact that Kaito was the only one living there at the moment.
Kaito came wandering in a minute later, with a defeated look on his face.
"So," he said snarkily, "what did you want to ask?"
"Why do you hide behind me whenever there is a fis-finny thing," he asked simply.
As Kaito groaned and buried his head in his hands he grumbled out a garbled answer.
"What was that?"
"I said whenever my brain sees a finny thing and you in the same place, it tells me you're the safest place I can be to get away from it!" he shouted in embarrassment.
Hakuba quirked an eyebrow in response.
Kaito groaned again and started explaining, "Remember when you fished me out of the koi pond?" as Hakuba nodded he continued. "You saved me from falling in a pond of f-finny things so now my brain, when put into fight-or-flight mode by that specific fear, says to go find you to be safe."
Hakuba nodded, he understood now. It became a 'thing', every time a fish showed up, Kaito ran to Hakuba, it was kinda amusing, to an extent. Having Kaitou Kid hide behind your back and peek over your shoulder when he sees a fish painting just warranted a facepalm (and apparently a heavy questioning from Nakamori-keibu).
