Personally don't see Tsurugi so much engaging "femdom", but rather being an Assertive Girl who sought to "kill two birds with one stone" - (1) get over the boys commenting on her *koff-koff* "huge tracts o' land", and (2) revealing her feelings for Coach-san.
Notwithstanding he has to exercise due caution from here on, it's safe to conclude: "It's Good To Be The Ki ... er, Coach!"