Awesome, been waiting for updates to this and Renai Sayokyoku for weeks. Incidentally both couples are 1a and 1b on my totally official best manga couples list. Also 1a and 1b on couples who inexplicably won't get pregnant but definitely should've, lol.
Wonder what's irking Hijiri about Koyori's dad, will there be trouble in paradise? Though as a dad, my daughter having a trusted childhood friend as a boyfriend may be the best case scenario.