Newlywed intersection point

Xiaolan plans to get married to her boyfriend because she is pregnant. Xiaolan's father, Bi Luzhi, raised his daughter alone after the death of his wife Chunzi. Although he felt helpless about his daughter's behavior of getting on the bus first and then paying for the ticket, he could only accept it, so he visited Xiaolan's boyfriend Hengyan's home during his daughter's wedding. And Tsunehiko's father, Tatsuhiko, also raised his son single-handedly after losing his wife. After two fathers with the same experience met, they chatted more and more enthusiastically over several cups of yellow soup, and even revealed unknown family secrets. How many secrets are hidden in the hearts of these two single fathers?