My son is engaged to be married this spring, and his fiancée, Asami-san, is very close with him. They often visit wedding venues on weekends, pretending they are there for rehearsal dinners or gift exchanges. Asami-san's father can't help but stare lustfully at her youthful body while she's away with his son. When my son leaves for work one day, leaving Asami-san behind, her father becomes aroused beyond shame...

ひとり息子が今春に結婚する予定で婚約中の女性アサミさん。結婚前の仲睦まじい若い男女は、週末になると、市内の式場へと、披露宴やら引き出物やらの打ち合わせだと言っては、楽しげに通う日々を送っていた。そんな「息子のいいなずけ」の若く瑞々しい女体隆起をじっとりとした陰湿な視線でいつも見つめている義父。息子がアサミさんを残して仕事へと出掛けていった日、義父は年甲斐も無く、恥ずかしい程に固く勃起した逸物を…！