離開咗屋企,喺東京做嘢嘅我,趁住放假,好耐冇返屋企。屋企住住阿爸阿媽同阿爺。阿嫲啱啱過身,阿媽照顧住因為好傷心,半身癱瘓嘅阿爺。阿爸對屋企毫無興趣,淨係識得飲酒。喺某個夜晚,我聽到阿爺嘅房入面傳出奇怪嘅聲。係咪有發情期嘅狗走咗入去?就係咁嘅聲。我好奇心起,靜靜咁打開咗紙門。點知…喺房入面,阿媽一邊俾阿爺啜乳,一邊好似好開心咁咁撫摸住阿爺嘅賓周…。