Butter Milk Donors

Japan Men's Sports College, commonly known as J-Balls, includes an organization that aims to cultivate healthy sperm to fight declining birth rates. Each year, it selects the top student and awards him the prestigious title of Best Balls. The recipient becomes the most desired donor at sperm banks…

• Format: MANGA
• Score: 66/100
• Genres: Comedy, Smut, Yaoi

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