You're delicious
Come and feed me
You've got something I should open wide for
"Delicious", Semisonic

The first thing wrong was that Asano flipping Keigo was studying (or at least attempting to). That was his first hint that something about this day was Not Quite Right. The second thing wrong was that Mizuiro had been eating the same damn piece of licorice for the past ten minutes or so, and even though Mizuiro didn't usually inhale his food, that was an unholy amount of time to spend on one measly rope of licorice. It was of Keigo's professional and informed opinion that Mr. Kojima was or had recently become a Satanist – it was the only logical explanation.

And, last but most decidedly not least, the third thing wrong was that Keigo was beginning to develop one bitch of a boner.

Keigo tried narrowing his eyes, tried shifting around uncomfortably from his spot on Mizuho's bedroom floor (Keigo's room had mysteriously become covered with dirty clothes), tried clearing his throat and sighing exasperatedly every few seconds, but nothing helped. Mizuiro, finally noticing that Keigo was not studying, but just squinting at him, swallowed the last bite of licorice and frowned.
"What are –"
Before he could finish the question Keigo interrupted him. "You Satanist."
"What?"
"I said, you're a Satanist."

Mizuiro only looked vaguely taken aback. "So, um, any particular reason why you recently came to this conclusion?"
"The licorice," Keigo said, still squinting.
"Did you want some? There's still the whole bag left." He brandished the bag (which was, indeed, mostly full) at Keigo.
"Nobody spends that much time eating licorice." He scooted closer to Mizuiro, moving so that their faces were centimeters away from each other. "Hmm…"
"You're a bit close, don't you think?"
"Just as I expected," Keigo said triumphantly, sitting back and folding his arms over his chest. "Your disguise is good, but you made one little mistake. The licorice."

Mizuiro threw the licorice bag at Keigo. Keigo threw himself at Mizuiro. It was all pretty normal until Mizuiro's leg found its way between Keigo's legs.

"Um," Mizuiro said.
"Uh," Keigo said.
"Do you…do you need to go take care of that or something? Because I won't be offended if –"

He shut up when Keigo ground his hips against his leg.

There was an audible click when Keigo swallowed, his mouth had suddenly become so dry, and he could feel his face heat up. He opened his mouth to say something like, 'wow that was weird, huh? Haha let's just finish this Pre-Cal or whatever it is,' made to move away, but Mizuiro's hand clamped on his wrist, held him in place, and his leg moved slowly, deliberately, against Keigo's crotch.

"Um," Keigo said. A dull flush had appeared on Mizuiro's face, and the room felt very quiet except for the sound of their breathing. They both jumped nearly out of their skin when the front door slammed open and Mizuho yelled that she was home. They broke apart, and Keigo stood to his feet hastily.

"I, uh…gotta go to the bathroom."

Mizuiro did not argue when Keigo rushed out of the room to the bathroom.