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Imouto ga Nuku
妹がヌくッ♥
A beautiful girl who looks perfect in her sailor uniform has an intense love for her older brother. She believes that because he has a very high libido, it is only natural for her to help him relieve himself to prevent him from accidentally assaulting someone else. However, she absolutely refuses to let him finish outside, insisting on receiving his seed herself.
The sister's affection goes beyond simple sibling care, turning into a possessive and demanding obsession. She wants her brother's seed and wants it now, in large quantities. The story follows the older brother's ordeals as he deals with a sister who loves him a little too strongly, blurring the lines between familial duty and forbidden desire.