Itsuka Sora kara

Yuki, a carefree and well-liked teenager, learns on his 17th birthday that his father is an alien, making him half-alien. He discovers he can alter his appearance, such as resembling a younger version of his human mother. His father warns him about unfriendly aliens on Earth and urges him to help protect humans. Yuki must balance keeping his abilities secret while continuing his school life with friends Shinichi and Midori. A further challenge arises as he worries about Shinichi developing feelings for him during his transformed state.