You want some information that makes this situation worse? I can tell you how to make it worse.
One of the Japanese traditions for a new baby's birth is to hold an oshichiya, which is a celebratory family dinner in which the newborn's name is shared with the rest of the family, usually both sets of grandparents. It’s not as common to uphold this tradition these days, but it’s not unheard of and I think the Todoroki family would possibly hold it as traditionalists.
But how does this make Touya’s situation worse?
The oshichiya is traditionally held on the seventh night after the baby is born.
Seven days after Shouto's birthday is Touya's birthday.
So three options, fanfic writers:
He was forced to share the day with Shouto.
His eighth birthday was celebrated on a different day.
With the stress that came with the new baby, Rei and Endeavor forgot. (Option 2 still stands here.)
I know what I’m going with in Ambush Sim.














