At this point I'm shipping Naoomi x Getting Away From This Entire Family
Now that we know the maid is the same age as them and spends her time groping "her charge" at school/away from the prying eyes of the rest of the family, it feels like every single person in that mansion is off their rocker in some fashion or other.
Naoomi's biggest misfortune is being forced to get involved with any of them, and probably Suzu will be the biggest offender of them all, what with that little "flag-not-flag" of the spoiler secret from the movie she wanted to emulate.
I just might not be built for this kind of story, but even outside of him getting slapped by two different women in 2-3 chapters' time, I just cannot fathom wanting to stick around any of them, even with the prospect of solving the big mystery behind why my dad had a double life and a secret family.
I'd just ask for hush money and then move to the other side of the country, which is why I will never be a character in a series like this.