When Kotori and her tiny hands thrust the book back towards the tall young man, two thoughts occurred to him:

1) He was still shirtless.

and

2) He should probably fix that.

And so, setting the book on to the table, Sasaki Kirima slipped the black button-up school uniform jacket off of the back of the chair and clothed himself with it, preserving his nude torso from further examination by his peers. "...I'll be sure to take good care of it, then. Thank you, Kotori-chan," Sasaki nodded, slipping the book back into his newly-donned jacket, "And... If you ever want it back or borrow it or something, just come and find me." 

"After all, someone like me's not that hard to miss." 

[s]Although considering the inability of anyone in the room to find him during the search that got them all into this mess, that might have stung just a little bit.[/s] 

Although such a scene may have been cause for a certain type of reader to comment fervently on with other readers of similar type, the fluffiness of the newly forged relationship between the songbird and the giant was cut short in a scant few seconds as a result of the actions of a certain chaotic duo of Level 5s. A frosty orb and a toppled tier later, and the class found themselves falling into the floor below. Of course, a 10-15 foot fall wasn't going to break a Level 5's ball of ice. Therefore, it came as no surprise that the entirety of the detention class was currently still stuck in the cold, spherical construct while the the two exceptionally powerful Level 5 espers were off undoubtedly causing large quantities of both collateral and property damage as they went on with their merry fray.  

But although it was reasonably safe as compared to what was happening elsewhere, wasting time being crowded like sardines in a ball of ice was not a preferrable way to be spending the rest of the afternoon. Really, Sasaki would much rather be out there fighting... The student shook his head. First priority was getting everyone out of here; he was sure they didn't want to waste time exchanging icebreakers while waiting for a literal icebreaker. The thought of throwing one of the desks encased with them was tempting, but he'd rather remain more low-key and, if he was being honest with himself, he wasn't sure if the desk would go through or if it would bounce back and give somebody brain damage. So he did the obvious action.

Without backing up, Sasaki slammed his shoulder into the frigid globule, sending dozens upon dozens of ice slivers flying outward.

"Haha... The ice must've been weaker than we thought, huh?" Sasaki commented before stepping into the shard-laden floor of the classroom below the detention room. He gave his best sheepish grin that looked more like he was trying to bite a metal pole in half. [i]'Bullshit, that thing was[/i] hard[i]'[/i], he thought, hand on his shoulder, [i]'But not hard enough to stop me, though.'[/i] The impact hadn't hurt the massive student at all, leaving nothing more than a numb feeling in his shoulder that lasted no more than a few seconds and a big hole where he had made his exit.