Medaka Kuroiwa Is Impervious to My Charms manga volume 4 features story and art by Ran Kuze.

Mona Kawai may have made a huge mistake. Ticked off by Medaka's latest rejection, she let her sugary façade slip enough for her secret inner sass to peek through and jab the stubborn holdout with a few sharp words. Now she's got to scramble to make sure she doesn't undo all the progress she's made sweetening Medaka up before her chief competitor takes him for a wild ride he'll not soon forget. As if that weren't enough, an old friend with a penchant for putting Mona in a tight spot comes to town and threatens to shake up the Queen Bee's picture-perfect persona—and force her to confront some feelings she may not be ready to face.