Ngl my first thought was "I should reread Citrus, it's been a while" lol.
On that note, I do not understand the incest tags for characters that met/knew each other/had a crush before they ever became family. Kafka here had feelings for a while from the looks of it, and in Citrus, Yuzu got an entire rubdown that left her hot and bothered before she had any idea Mei was her new sister. It just seems inaccurate idk.