In the ending where Marina says it was Shizuka's fault that Marina mom was having a bad day, does this imply Marina's dad was still going to see Shizuka's mom? I find it hard to believe that Marina dad would stay committed to one whore for at least 8 years even as she became haggier.
But what if what Marina said was literal and it was because Marina mom found out her daughter was hanging around the Kuze daughter?