A father who was left alone to raise his daughter Yui after his wife passed away one day finds out that Yui is not his child but another man's child when the topic of blood type comes up. He is devastated by sadness and regret for a day, but his daughter, who is not related by blood, suddenly starts to look like a woman... and when he touches his sleeping daughter's nipples, something explodes! The ex-father goes crazy and devours his ex-daughter. If they are not related by blood, there is no problem with cumming inside her! The days of raping the daughter he had raised with care for 19 years until she becomes pregnant have begun...