User blog comment:SPARTAN-047/Monster Girl Fan Fiction Archive/@comment-24535599-20160120184942

Found some stories with foster elder sister/little brother, as well as some where the sisters turned into monsters and fall for their real little brothers, some are smuts, others are just about girls looking out for their precious otouto.

These stories are foster sister/brother

This one's about a Holstaur saving her tsundere otouto from being raped by a Dark Elf and Manticore

In this one a Jabberwock and her mouths are all lovey dovey for her little brother

This smut-free story is about a University student moving to an apartment close to the school, but his overbearing Echidna sister isn't so pleased.

These next ones are real sister/brother

A boy's Onee-chan is brought back from the dead as a Wight, however her newfound love for him may prove to be fatal (no snuff)

A [http://pastebin.com/Bba7DWCJ monster hating teen flees from his town before it is converted into a monster girl town. His now Kikimora sister tries to convince him to come back.]