Kouan Ogata asks Ryoan to convince O-Shina from the Ninaya store to be vaccinated. Ryoan follows her, but then finds her in the company of her fiancée, Gentaku Inokawa of the Hanaoka School and Doctor Inokawa's eldest son. The next day O-Shina reveals to Ryoan that she is being forced to marry Gentaku, but in fact loves Manjiro who saved her at Shibahama beach...