The hentai is based on the original manga "Nee,... Shiyo" by the popular hentai mangaka Pija, known for his quality art and love for ahegao and similar genres. Some of them are disappointed with this news and some - happy, because, despite poor animation quality, studio tries to keep original style of draping, which is a big plus for Pija's draping. The parents are away on a business trip leaving the half-brother and sister alone. Mayu is a sexy little sister - small in stature with huge "rocket type" breasts. She likes to give her brother Takuya-kun a blowjob, but because of her height difference she has to squat. This position has always turned her on more than lying down or sitting up. Takuya is always jealous of her sister, because she is very popular with guys at the academy.