Mozzarella's manga / #age gap(60)

1) pushover guy marries deceased wife's brother under mom-in-law's influence 2) Sex offender gets gay with hs friend, stepmother interferes and they grow up to be gay cause lawyers 3) 'loan shark' falls for young guy and uses debt of ex wife and his stepson to keep him to himself 4) Guy comes back home to find out the kid he bullied at hs is now his dad's lover 5) Dad from the gay bullied kid at story #4 falls for an old friend of said kid who he treated badly in the past