May it be that I find is the 51st episode of Chihayafuru.
As the club had broken into groups for training, the last day of camp has Chihaya facing off against Rion three times. To everyone's surprise, Midori Sakurazawa gives Chihaya advice mid-match, which she had never done with anyone else.
Chihaya and Taichi play each other in a final match, with Taichi emerging as the victor. On their train ride home, Taichi promises to defeat Chihaya in an official match when she's at full strength, and she eagerly accepts her rival's challenge.
Poems of the Episode
In order of appearance: