"I've kept the breast milk ticket I gave you when you were a child...," Ichika found the ticket she'd given her brother-in-law, telling him to use it whenever he felt lonely. To comfort her brother-in-law, who was bullied at school, she decides to endlessly soothe him with her breasts. Day after day, her brother-in-law finds strength in being enveloped by her G-cup, elastic breasts. Eventually, she can no longer be satisfied with just breasts, and her brother-in-law's cock starts to get hard during their nursing play. Despite knowing it's wrong, she can't resist her desire for her brother-in-law's cock and ends up having a secret creampie sex with him... .