Otona no Mondai

Aka Otona no Mondai

From Fifay.net:
Naoto is a stressed-out college student doing his best to juggle the eccentricities of his divorced parents with his own burgeoning romance. His stress deepens after his gay father proposes to the handsome and elegant male lover. This is a humourous series by Ima Ichiko about the modern, dysfunctional family.