Before We Vanish (2018)

Narumi is on bad with her husband, Shinji, when, one day, Shinji goes missing. He comes back a couple of days later, but he seems like a totally different person, and he is now gentle and tender. He goes for a walk every day. Meanwhile, journalist Sakurai covers the story of a family that was brutally murdered, when an unexplained phenomenon takes place. Shinji Kase tells his wife that he came to Earth to invade.