Mother who gave anus to her son

Reika's son Makoto, who she had raised by herself, is getting married, and she is looking forward to that day with a heavy burden lifted off her shoulders. One day, my son suddenly says he wants to stop getting married, but when I ask him why, he says, ``I don't have any experience with women.'' Reika thought that she could do something and decided to offer her anus to Makoto. With the help of her brother-in-law, who has always supported her, Reika's anus continues to develop, dreaming of the day she can dedicate it to her beloved Makoto...