"...  geh..." Hikari blanches for a moment at the command, too stunned to immediately respond.  The girl's heard of bare-bottom paddling before, of course, but bare-chested?  Her eyes fall on Yukiko, giving her a mournful stare, but she slowly nods in spite of her trepidation.  "...  hai, sensei!"<br/><br/>The younger student reaches behind herself, fiddling with her bra's clasp with both hands to quickly unfasten it.  There's little more effort required to remove it, as the garment had been strained hard enough trying to restrain her oversized breasts that it practically pops off once loosed, as though desperately fleeing at the first opportunity from the Herculean task heaped upon it.  The milky orbs spill out with a pronounced bounce as she shifts the straps off her shoulders, wobbling just so with the continued impetus, puffy bubblegum-pink nipples bobbing enticingly as she moves.<br/><br/>"Ehm..." Hikari's face flares deep crimson as she renders herself topless before her teacher and fellow student, and she has to look at Yukiko again to try and remember why she's doing this.  The thought is somewhat hazy in her head, though; she knows she's doing it to help her, but she's having trouble drawing the line of reasoning that lead to<em>this</em>being a useful method of assistance again.  Then the thought occurs to her that, being as this is a substitution punishment, the other girl would be similarly exposed and tormented if she went back on her agreement; for some reason she actually finds herself imagining that, and while it's a somewhat amusing mental picture, she figures it wouldn't do anything for Yukiko's bad attitude<em>or</em>her already low opinion of her.<br/><br/>Thus, her thumbs tuck into the waistband of her panties at either hip.  Swallowing the lump in her throat, she bends forward from the waist and peels the article down her thighs, her nicely-rounded derriere taking on a tempting heart-shape for a moment as she bends herself double and stretches down as if to touch her toes, gymnastically-toned gluteal sinews flexing firm.  The scatter-brained student has a light dusting of pubic fuzz that seems to be neatly-cropped into a rectangle crowning her mound--perplexing, since she's never practiced any particular form of intimate grooming and styling--but is otherwise smooth, plump, and very pink with a combination of youth and warmth.<br/><br/>Hikari remains bent forward, leaving her panties around her ankles almost like a pair of shackles as she reaches forward to plant her palms firmly on the edge of the desk.  The girl bites her lip and squeezes her eyes tightly shut, trembling from head to toe with embarrassment, anxiety, and more than a little bit of fear.  Every sound she hears seems to make her tense in anticipation of the expected blow to come, inhaling sharply and flinching visibly.