Chou Dakaretai Otoko

From Attractive Fascinante:
A high-schooler, Asakura Shinobu, is a new illustrator and his cousin, Kouki, is living with him and loves him. The editor, Watase Riku, and the novelist, Shirakura Yuushi, are both extremely interested in Shinobu’s body. Shinobu admires Riku very much. When Riku asked Shinobu to use his body to satisfy Shirakura sensei, will he agree to it? How would Kouki save Shinobu from the attacks by the two perverted men? Who will Shinobu give his first time to?