Perhaps it's an offshoot of Man's instinct for "self-preservation" ... anyone out there who knows biology well enough could probably fill us in on that in more detail.
Not even the nuclear apocalypse which preceded the "Hokuto no Ken" story could keep Kouhai-kun from *koff-koff* qualifying for the tournament, or the (a-hem) "greater prize" awaiting him (wink-wink, nudge-nudge).
I thought she had a love egg inside her while swimming and that was why she almost drowned and was immediately horny afterward, but I was wrong. It was just normal hentai teenager hormones.
Interesting title.
Man, what a coincidence, though. If he wasn't there, her life would have been in danger. Good on him for immediately going in to save her.
Great ending though. With a prize/reward like that, I can guarantee you he will make the tournament 100%. Hell, promise him something even more than that and he's sure to win the entire thing!
DAYUM! ... Oozawa-senpai qualifies not only as an Assertive Girl, but it seems that sooner or later, if Fukama-kun did not "make a move", she might have done so herself. And his happening to raise the "Rescue Romance" flag (thank you, TV Tropes) did help.
And then, after saying "sayonara" to his virginity in rather grand fashion, 'Senpai' makes him "an offer he cant refuse" on Page 12.
Finally, she raises the bar by telling him, IF he qualifies for and joins her in the upcoming tournament, she'll consider dating him ... that's probably a foregone conclusion, which, if we're fortunate, Enuhani-sensei will display in a sequel. Do Your Best, Fukama ... you Lucky Bastard (GRR)!