Rating: 4.5/5 stars
Given the context of manga, the most plausible interpretation is that the user intended something like:
"Uchi no utouto, maji de dekai ñame manga"
Which could translate roughly to: "My dozy/sleepy (character), seriously huge yam manga" – or more likely, a meme or niche manga title about a giant sleepy character and a yam. uchi no utouto maji de dekain %C3%B1ame manga
Nagisa: A dark-skinned girl with chest-length blonde hair and a mischievous, teasing personality. Overview