I'm walking into shakey territory because I won't lie I basically was a big hypocrite about the little brothers (Takumi included, for a while I wanted to marry him super hard because I essentually thought he was attractive. Now I basically have different biases I'd guess. Now I don't... really care. I basically have one OTP for most of the siblings anyway)
I kinda wanna know when the decision to make them S-rankable happened in story happened among the writers.