Uchi no Otouto Maji de Dekain Dakedo Mi ni Konai? (translation: My Little Brother is Seriously Huge, Want to Come See? ) is an adult-oriented manga series that has also been adapted into a short anime series.
However, after searching memory and databases (including manga databases like MyAnimeList, MangaUpdates, and known doujinshi circles), . It may be: uchi no utouto maji de dekain %C3%B1ame manga
Assuming you meant: — "My Sleepyhead, Seriously Big Licking Manga" — this isn’t a mainstream title, but rather sounds like a niche, maybe fan-translated doujinshi or web manga. General Information Uchi no Otouto Maji de Dekain
A critical plot point for the audience's comfort is that the siblings are not related by blood. This narrative device is common in Japanese manga to allow for romantic or intimate subplots between siblings without violating social taboos. This allows the story to tease a potential romance without crossing the line into incest in the traditional sense. The Sleepy Head: Often has droopy eyes (tareme)