Keigo has an identity disorder

So he has two alters, the host which is Keigo and his other alter Hawks, this alter appeared because of the trauma of when he was mistreated by his parents

Usually Hawks takes control when Keigo can't handle my situation.

The door opens, he just got home from work, currently it's Hawks who is there, because at work it's almost always Hawks who takes control when he's at work because it's too stressful for keigo