Sundome!! Milky Way

A man who works long hours at his corporate job has little personal time. On the way home from his grandmother's birthday, he witnesses a UFO and crashes his car. An alien approaches, and he loses consciousness. When he wakes up, he discovers a nearly naked woman in his apartment. The alien responsible for the crash is there, having come to Earth to seduce a human man and have a child. However, every time he touches her, she becomes flustered and reverts to her monstrous alien form. He must figure out how to deal with her being in his home. She also faces the challenge of conceiving a child when she cannot even kiss without losing control.