Onakingo no Biyaku Ecchi

In an effort to keep him all to herself, his girlfriend wants to get pregnant with his baby no matter what. She will use her upcoming birthday in her plan, control him by placing a ban on masturbation and sex until that day, and make him drink an aphrodisiac.

The plan: Lie to him about taking contraceptive pills, and when he's convinced, make him cum inside. This is a book about flirty love with a girlfriend who's just a little bit "dark" about her intentions.

(Source: [Melonbooks](https://www.melonbooks.co.jp/detail/detail.php?product_id=652135))