Call me strange, but: The moment your wife / GF wants to make up with you by getting you pizza instead of trying to "bribe" you with sex, you know shes the one for life.
Yeah, it's weird, but it sounds like Uehara is the kind of introvert that NEEDS his own space from time to time.
Also those horndogs can't even follow their own rules, considering despite her objections Sumika caved even though it's a weekday.