Apparently Shizuru had gotten the memo about "Harass Minoru Day" -- or perhaps it had to do with his prior hassling about her attendance habits.

Either way, she was exceptionally good at finding hiding spots, and had the patience (when she wanted to) for a stakeout.

And so, when Minoru finally passed by, Shizuru popped out, grabbed his arm, pulled in close to his face, and...

liiick.