Sou is genuinely happy and longing for familial love.
Honestly I wonder how he will react to all of the girls' other self, especially his family. Though with how dense and his good & kind nature, I doubt nothing major happen. Probably.
Honestly I always want to see the Overbearing "I will take care of you forever" Yandere dealing with opportunistic and unmotivated lazy ass love interest, who don't care as long they are taken care for.
Like logically, in real life, the Yandere is always the red flag. But what if they met...