Sora o Tobu, Mittsu no Hōhō. (空を飛ぶ、3つの方法。, lit. Three Ways to Fly in the Sky, commonly abbreviated as Soramitsu (そらみつ)) is a Japanese adult visual novel developed by La'cryma. It was released on July 25, 2008 for Windows as a limited edition DVD. The gameplay in Soramitsu follows a linear plot line, which offers pre-determined scenarios and courses of interaction, and focuses on the appeal of the female main characters.
https://en.wikipedia.org/wiki/Sora_o_Tobu,_Mittsu_no_H%C5%8Dh%C5%8D.