I definitely like Victor's more mature side now, and him regarding Asai as his brother is just amusing.
As for Kozumi and Mizumi, not much opinion for Kozumi since she hasn't had much screentime after being pregnant, but for Mizumi, I like her as a character now after what she went through for Asai.
All in all, I honestly think you've done an amazing job at making the characters feel alive.
P.S: wtf can't write more than 500 characters