Hachigatsu Kokonoka Boku wa Kimi ni Kuwareru.

In order to eat me, my enigmatic stalker is protecting me from other strange women― A high school boy, Sakurai, has a secret he cannot tell anyone: he has been plagued by stalkers since he was a child. One day, his classmate, Ueda, suddenly transforms into a monster, revealed to be one of his stalkers. Miyako, who has always been closely following him, appears and saves him. She tells Sakurai that the monsters, commonly known as urban legends in Japan, are after him because they love him. What will be the fate of Sakurai who is loved by countless creatures disguised as beautiful girls? (Source: Takeshobo, translated)