トモちゃんは女の子! 6 [Tomo Chan Wa Onna No Ko 6] by Fumita Yanagida

Amid meddling friends and hectic school events, a brash tomboy redoubles her efforts to be seen as a girl by her oblivious childhood friend, setting off awkward outings, competitive training sessions, and sparks of jealousy that push them toward honesty. Schemes from a sharp-tongued best friend and an exuberant classmate backfire in funny ways yet still lead to small breakthroughs, as both leads begin confronting their feelings without breaking the fragile balance of their long-standing friendship.