"Yuji, you don't look well. What's wrong?" After breaking up with his girlfriend who he was in love with, Yuuji is completely burned out. Worried about Yuuji, who shows no signs of recovering, his sister-in-law Ayame comes up with a miracle cure for heartbreak. "C'mon, rub my breasts and cheer up! I'll give them to you all tonight!" His sister-in-law unashamedly presses her breasts, oozing with breast milk, against him. Yuuji is drawn to her beautiful breasts, which are even bigger than his ex-girlfriend's, and the breast milk he is seeing up close for the first time...