I'm a Royal Tutor in My Sister's Dress (ドレスな僕がやんごとなき方々の家庭教師様な件 Dress na Boku ga Yangotonaki Katagata no Kateikyoushi-sama na Kudan) is a Romantic Comedy manga series, turned into a much longer Light Novel series. written by Mizuki Nomura and illustrated by Sakurana Haru (manga) and Karory (light novel).
Ordinary boy Sherlock Doyle finds that his genius sister Glinda has abandoned her post as a royal tutor and that unless he takes her place, they could both be executed. He finds himself having to teach maths to the king's five young children, while attempting to stop anybody finding about his true gender.
I'm a Royal Tutor in My Sister's Dress provides examples of:
- Accidental Pervert: Sherlock, in his hasty attempt to leave the castle, accidentally sees Ryuuju bathing... Then proceeds to fall into Seira's bath.
- Adaptation Expansion: The original manga only ran for two volumes from June 2011 to July 2012. The Light Novels ran for eight volumes from 2012 to 2015.
- Child Prodigy: Seira, whose intelligence is said to be on par with Glinda's.
- Dude Magnet: As Glinda, Sherlock has amassed a large amount of male admirers... much to his dismay.
- Emotionless Girl: Shinn hasn't shown any emotion since he was introduced and has yet to speak.
- Exactly What It Says on the Tin: Just as the title says, it's about a guy who becomes a royal tutor while wearing his sister's dress.
- Intelligence Equals Isolation: because of her intellect, Glinda never played with other kids besides Sherlock.
- Mom Looks Like a Sister: And their dad looks like their older brother.
- Named After Someone Famous: Sherlock is quite obviously named after the famous fictional detective Sherlock Holmes. The last name that he and his sister share is taken from Sherlock Holmes's author, Sir Arthur Conan Doyle.
- Nosebleed: Ryuuju gets one after Sherlock's shirt accidentally falls off, thinking that Glinda's breasts had been exposed.
- Precocious Crush: Ryuuju develops one on Glinda... who, unbeknownst to him, is actually Sherlock
- Private Tutor: Glinda was originally planned to be this before her disappearance and her place was secretly taken by her brother Sherlock.
- Trickster Twins: Sarasa and Orie. This comes and bites them in the back in the third chapter when Sherlock punishes them from tricking him.
- What If?: One side story about what'd happen if Sherlock wasn't an example of Dude Looks Like a Lady. He expected it'd make Helmut give up the plan to pass him up as Glinda but to no avail. He was deemed a masculine girl and the only girls he attracted were masculine as well. He was glad it was All Just a Dream.
- Yaoi Fangirl: Anneth, who ships her king and Halmut together.
