Triggered by her first period, the brother begins a reclusive lifestyle. For ten years, he continues sucking his sister's breasts like an infant, groping her G-cup tits and fondling her sensitive, developing nipples. Realistic depiction of an "abnormal daily life" within one family: summer breastfeeding and handjob sessions, pretend lactation play, farewell sex, Christmas breastfeeding intercourse... A slightly twisted AV portraying eerie, authentic scenes from everyday life with raw honesty.