Kiyoshi really was bad at studying. It wasn't for lack of trying; there was just always something more interesting to be found. Like that one time when he was studying at the library and he found Hyuga asleep at the desk, just begging to be drawn on with the marker that just happened to be on the desk in front of him.
Coincidentally, the library was where he was headed now. He had a test in two days and he wanted to try his hand at studying again, not that he had much hope he would succeed. He had just sat down and was beginning to unpack his workbook and pencils when he saw the 'something more interesting' that was sure to halt his studying.
Kuroko was standing on the desk in front of Kiyoshi. His small teammate was constructing what seemed like an army of paper airplanes, once again going unnoticed by the students and librarians milling around the tables. Kiyoshi looked around and saw a familiar head of red hair sitting at a table a little ways away from them, and putting two and two together, he began to make his own army of paper airplanes, a bit smaller than usual.
Suddenly he saw something white shoot across his vision, heading over to the unsuspecting redhead, and hitting him on the shoulder. Startled, Kagami turned around and searched but couldn't see the culprit. Facing forward again, he was repeatedly hit with paper airplane of different sizes until his face matched his face.
Kiyoshi couldn't breathe; the effort of holding in his laughter was so great, when he got hit with not one but two airplanes himself. Looking up with a look of disbelief mixed with amusement, he saw Kuroko hiding behind a pile of books on his desk and Kagami giving him a look of vengeance. The war was on!
After the War of Paper Airplanes was had and they couldn't breathe correctly anymore, Kagami said goodbye and left for his house. Kiyoshi felt a tug on his finger and looked down at the desk to see Kuroko holding his finger. Bending and outing his head on the desk, he commended Kuroko for thwarting his attempt at studying.
Catching Kiyoshi mid laugh, Kuroko planted a kiss on his cheek, thank you, Kiyoshi-kun.