He's good at kissing, very responsive. It's just not very obvious how much he's enjoying it. Maybe she should explore that area right there, he squirmed a bit last time. 

Yes, perhaps, squirming is probably a good objective.

Squirming ensues. 

He relaxes after that, the kisses escalating in intensity. He seems to find Sadde's lips fascinating. 

Eeeee, she finds his lips pretty fascinating, too!

Now what should her hands do? They might roam—above the waist—unless he objects—does he?

She can roam! This elicits what might be termed giggling, but the kisses continue in earnest.

Alistair has entirely forgotten his ice cream. 

Oh my god that is adorable. "Your ice cream will melt," she says eventually.

"Ice cream," he says, returning to his reluctantly, "is a deliciously distracting temptation. I'll work my way through as fast as I can." 

"Make it a race," she suggests. "With the punishment of brainfreeze if you go too fast."

"You're on."

Alistair proceeds to be weirdly competitive about eating his ice cream.

She can do competitive!

...she does get brainfrozen. But doesn't let that slow her down much.

No contest.

Alistair avoids brainfreeze, and overtakes her in this completely unimportant competition.

He seems quite proud of himself. 

She thinks he deserves a reward.

That reward is more kisses.

"I have to say, this is going better than I was expecting."

"Expecting before the date started at all, or expecting conditional on the little interruptions?"

"Both. I was kind of worried I would mess it up."

"You did fine. You're nice and interesting and really cute."

"If you say so. You seem pretty smart, so I think I have to trust your judgment." 

She giggles. "Such a flatterer." She plants another peck on his lips.

Kisses!

Alistair is appropriately enthusiastic. 

They can keep doing this for a while.

Eventually, though, they must return to the humdrum of daily life.

They do! And the humdrum of daily life happens to be the weekend, and although Alistair doesn't have any way to contact the cardcaptor and his friend he does go to the same school as them.

So, after a weekend of magic testing and learning, and most of a school day, Sadde ditches his last class to wait in front of Alistair's school.

The cardcaptor's friend is apparently ditching class, given the way he's sneaking back into the school when he spots Sadde.

"Shouldn't you be in class, young man?" 

Sadde realizes the boy probably won't recognize him... and decides to milk this. "I should say the same to you."

"One of us is actually supposed to be here, and it's not you. Is there a story there?"