I love this mangaka, but this oneshot is a big mess: the story is unfinished and rushed; the seme is trash (sorry but those who raise their hands or their kids are trash for me); big sister is just a legend; Natsuki is kinda a pervert (but he has a kind heart so it's okay)... The twins were the best.
Adhdteishsgsghbd!!!! (╯°Д °)╯╧╧ (/TДT)/