The Curse of Jusenkyo: Ranma and Genma's journey begins at Jusenkyo training ground in China. Falling into Nyannichuan (Spring of Drowned Girl), Ranma is cursed to transform into a girl when doused in cold water. Genma falls into Shonmaoniang (Spring of Drowned Panda). Hot water acts as the temporary antidote.
Akane's Hair & Emotional Shift: In early episodes, Akane keeps long hair to emulate Kasumi and impress Dr. Tofu. During Ranma's fight with Ryoga, Akane's hair is accidentally severed by Ryoga's flying headband. Ranma reassures her, leading Akane to embrace her short hair and move on from Dr. Tofu, directing her growing affection toward Ranma.
Ryoga / P-Chan Secret: Ryoga Hibiki fell into Heitongniang (Spring of Drowned Black Pig) due to Ranma's carelessness in China. Transforming into a tiny black piglet when wet, he is adopted by an oblivious Akane as her pet "P-Chan". This secret creates continuous dramatic irony, as Ryoga sleeps in Akane's lap while harboring a deep grudge against Ranma.
Amazon Laws & Romantic Harem: Shampoo enters Japan to kill female Ranma under Amazon law for defeating her. When male Ranma accidentally defeats her, Amazon law dictates she must marry him. Coupled with Ukyo Kuonji (Ranma's childhood fiancee) and Kodachi Kuno, Ranma is surrounded by persistent suitors, driving Akane's jealousy and cementing their mutual reliance.