The manga was written and illustrated by a Japanese artist. As my training data includes a broad range of sources up to early 2023, I recommend checking the latest databases or manga platforms like MyAnimeList, Anime News Network, or official publisher websites for the most accurate and up-to-date information on its publication status.
(Visual: She lands in a compromising position or just falls on the protagonist.) Sister: "Oww... I told him to clean this up..." ane wa yanmama manga
Though the main plot focuses on a delinquent boy and a studious girl, the side character—Hana's older sister—is a proto-yanmama. She gave up her delinquent life to raise a child but still rides a modified scooter. A spiritual predecessor to the trope. The manga was written and illustrated by a Japanese artist