"Come straight home!" had been what his father said every morning for the past three weeks, one prior to his birthday and the two following, his expression red with the promise of punishment if not obeyed, hellbent on preserving his son's chastity. Koarin thought it was a little extreme and somewhat overbearing. Dawn just gave him a sad smile after every outburst, despite having been the one to press a short string of condoms into his hand the day after he turned sixteen.
But he wasn't turning home every night because he was afraid of what would happen if he didn't (Zero wasn't the "beat his children" type, as scary as he made himself into). He was more focused on trying to find the balance between keeping Dad happy while trying to show his relationship with Sephiroth wasn't as damaging or perverse as Zero liked to make it sound. If he could show Sephiroth was in it for more than his own gratification (since obviously he was the son of the devil, tempting prepubescent boys into relationships so to reap the sexual rewards many years later).
Koarin didn't ask for much. He really didn't want a lot in the world (yet), but Somebody thought to put a difficult man on earth to be a poor boy's father. At this rate, he was going to be a virgin until he moved out, if only to please the old man. Not that "doing it" was something he wanted to do for the sake of doing it; masturbating served pretty well. Nor was he going to do it because he thought that Sephiroth would leave him if he didn't; he held out for quite a few years without tapping his tailbone, so he can wait a few more if it comes to it...and if he did leave him, Koarin reserved the right to ask Angeal to kick his ass (and maybe hire Genesis for the job too; bastard would do it simply because he only needs an excuse to take the senior class Ice King down some pegs, not because Koarin's honor was worth preserving).
On that note, if Sephiroth was cheating, he was doing a perfect job of not making Koarin suspicious of it. But he did want to make a point of it, nonetheless. "Hey, if you're gonna be unfaithful," he said that afternoon at lunch, "break up with me first."
Sephiroth sniffed, indignantly. "In a heartbeat. I wouldn't want to give that man any more ammunition against either of us. Here, these processes aren't labeled correctly."
"Erm, oops." Except he learned long ago if some of his answers weren't right, Sephiroth had incentive to get physically closer to him to show him where he assumingly when astray. He liked hovering and crowding Ko, and Koarin really liked it when he did. He wasn't a brainless child anymore, who had to be corrected more times than Koarin could remember (he knew there were a lot past the two or three instances he could only barely recall). A purposeful wrong answer, here or there didn't hurt anyone, right?
A little more, and some fed orange slices later, Seph tapped the pages of his open textbook. "Hey. Ask your mother to pick up the twins tomorrow."
Koarin looked up. "Huh?"
"Ask her to pick up the kids. And sneak out a couple change of clothes."