[Benii Kenkyuujo] The Day the youngest son lost his virginity thanks to his mother in a swimsuit.

[Benii kenkyuujo] Surrogacy: The case of Yuka Shirakawa (Full version)

[Benii Kenkyuujo] The mother of the Oba Household ~A Daily Routine of Submission to her Son's Indulgences ~

[Benii Kenkyuujo] Haha ga Kabe ni Hamatte Ugokenakatta node... | The day my mom got stuck in the wall and couldn't move... [English]

[Benii Kenkyuujo] I hired a cleaning lady and she turned out to be my mother (full version)

[Benii Kenkyuujo] Kaseifu Yondara Haha ga Kita - I Called The Housekeeper and My Mother Came [English][DarklordMTLs]