So, his mother was absent, father never really acted as a father, they let a onesan to raise their son, the princess never told him that she loves him and treat him strict... Everyone took that their relationship with the MC was great without proper chatting with him about, nobody really acted as a caring person towards the MC, only the demon lord... "I am sorry" is not enough, they are so stupid to not see it coming, especially the Father, he should give his son advices and confidence to not feel small...