ねいちゃあトリップ

Hero was staying under the tree hesitating whether to approach the girl he liked for a long time or not when the tree was struck by the lightning. As his vision cleared he saw a cave with an altar and a beautiful woman looking at him anxiously. And she looked almost like the girl of his interest! Where is he? Is this a fantasy world? What will happen to him?

[From vndbreview]