In a duel, the mightiest wins, no questions asked.
Thus, one would expect that Lenny, with his fit body, steely fists and wind-shearing kicks would make short work of Decus, who, as your typical elvish wiseman, is kinda spindly, wobbly and rather unfit.
Too bad this was decided in a math quiz.
Which was going very well for Lenny. However, Decus, when realizing he was failing to correctly apply a decomposition algorithm to 2+2+2+2, just went ballistic and burned the entire stand. He won the match, but that still got him launched by Chisato's secret torture mechanisms. And, Lenny, well. He at least had fun calculating the exact trajectory Decus' flying body would follow after the launching while resting at the hospital. He even got it correct! Sadly, for the Wiseman, he landed inside Alma Kinan's quarters. The girls are still merrily brainwashing Decus into the lesbian cult, and they predict she (or did you think they'd actually let Decus stay as a man?) will be initiated within a month. Decusa will make a truly wondrous priestess to Alma Kinan.
