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Gyaru Prominently features a female character who has a distinct American-emulated fashion style, such as tanned skin, bleached hair, and excessive makeup. Also known as gal.Incest Features sexual or romantic relations between characters who are related by blood.Male Protagonist Main character is male.Nakadashi Creampie; features sexual ejaculation inside of a character.Female Harem Main cast features the protagonist plus several female characters who are romantically interested in them.My Younger Brother is Really Big, Wanna Come See?
ウチの弟マジでデカイんだけど見にこない？
Nao is a young boy caught in an embarrassing situation when his older sister Chiaki discovers him masturbating in the bathroom. To his shock, Chiaki is not angry but fascinated by the unusually large size of his penis. She even takes a photo and shares it with her friends, inviting them over to witness what she calls his "Cockzilla."
The next day, Chiaki's friends Nagisa and Yukiko arrive at the house. With no regard for Nao's privacy, Chiaki exposes him to their curious gazes. What begins as mere observation quickly escalates as the girls, driven by curiosity and a desire to test his limits, engage in stimulating him, pulling Nao into his first sexual experiences.
