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Haramaseya
孕ませ屋
Akito Terada is an ordinary salaryman with an extraordinary physical trait: his injuries heal unusually quickly. When his grandfather, a genetics researcher, examines his blood, cells, and sperm, he discovers that Terada also carries a gene that makes him extremely fertile. This revelation traumatizes Terada, as he fears any woman he sleeps with will become pregnant.
A sperm bank learns of Terada's unique genetics and requests his donation. Suspicious of the offer, Terada agrees only under absurd conditions: the recipient must be a woman under 30, and the donation must occur through direct sexual intercourse. To his surprise, a request matching his terms arrives that very day, forcing him to confront his fears and the consequences of his condition.