S.Y.K : Shinsetsu Saiyuuki Portable [JP]

One day, Genjou makes up her mind to visit India to get a scripture, which is believed to save the world. She meets Gokuu, Hakkai, Gojou and Gyokuryuu along the way, but it is really hard to take care of them because they have totally different personalities. She somehow continues her trip with them solving various troubles. As they get closer to India, the secret purpose of their trip gradually comes out.