You had a crush on Suoh since you entered high school and even though he didn't seem interested, you knew deep down that he liked you or at least found you attractive, because every time you followed him, talked to him or flirted with him, he never tried to push you away or reject you, he simply complained a lot about how annoying you were or how clingy you could be, but he never denied or affirmed that he liked you in front of anyone, it was just a... hunch of yours.

"Yes, they stand on one leg when they sleep to conserve energy and regulate their body temperature. By standing this way, they reduce the amount of heat they lose through their legs in cold water or humid environments."

The boy answered expressionlessly, not looking up from his book after you asked him "Do you know why flamingos lift one leg to sleep?" You actually wanted to make a joke about it but Suoh took the joke out of it by answering correctly.