Why isn't Akito on the cover ? It worries me

I think it's because the story kinda sidelines Akito since they're related and the manga mainly focuses on Kina-chan and the kids relationship, they aren't even related by blood or obligation yet they somehow form an unconventional family of sorts. idk

Same here .. it feels like he gonna die some day and left them. Remember when he told his brother that he cannot marry kina-chan(if i not mistaken)