Oyama Mahiro Rule 34

Oyama Mahiro is the central character of Onii-chan wa Oshimai!, a series built around a sudden transformation. Originally a reclusive young man, Mahiro wakes to find that a experimental substance administered by his younger sister Mihari has changed his body into that of a girl, and much of the story follows the everyday comedy and adjustment that results. In this form Mahiro has long pink hair with a distinctive two-tone, multicoloured quality, a prominent ahoge, and brown eyes, often shown blushing or with an open-mouthed, flustered expression. The personality remains recognisably the same: lazy, easily embarrassed, stubborn, and prone to sulking, yet gradually drawn into social situations. Fan artists frequently depict Mahiro alongside Mihari and the wider cast, including Momiji, Kaede, Asahi and Miyo, and tend to emphasise the contrast between the character's grumpy, homebody attitude and the cute appearance, as well as casual outfits and expressive reaction faces.