Widow Boarding House? We also rent out cleavage

Yumi lost her husband seven years ago and runs a boarding house on her own. The four lodgers are Osaki, who has failed the entrance exam for ten years, former yakuza Yoneda and Yamaguchi, and her daughter Miyuki. On the seventh anniversary of her husband's death, Yumi, dressed in mourning clothes, comforts herself by talking to her late husband. Osaki peeks at Yumi as she climaxes, convulsing violently... First film in the "Widows Boarding House?" series directed by Daikei Shimizu.