"Yuji-kun, you don't seem well. What's wrong?" Yuji, who had burned out completely after breaking up with his loving girlfriend. Ayame, his older sister who was worried about Yuji, who showed no signs of recovering, came up with a special medicine for heartbreak. "Come on, let me rub your breasts and cheer you up! I'll have you all to myself today!" His older sister, who pushes her big breasts oozing with breast milk without hesitation. Yuji is drawn in by the beautiful big breasts that are even better than his ex-girlfriend and the breast milk he sees up close for the first time...