Ayaka, his mother's best friend, suddenly comes to stay after a fight with her husband. She won't come home until her husband apologizes! Ayaka declares with a snort. Kosuke has no choice but to listen to his mother's complaints with him, but Ayaka becomes so angry that she starts drinking... Drunk, Ayaka falls asleep while clinging to Kosuke. Kosuke blushes at the feeling of her soft breasts against his body. He carries the sleeping Ayaka to the bedroom, suppressing his pounding heart, but he becomes aroused by the defenseless Ayaka...