Serendipity's Collision

Gray comes from the present which he was wishing to time travel back in time to find Serendipity, a girl who has a great personality when it comes to Gray. He learned everything to make a perfect time machine named Serendipity I, a machine where he can travel any time that he exists. But if Serendipity collides with his machine, the future will be changed. Changing the future meaning the lose of Serendipity I, that makes him disappear in Earth. Gray risks his own existence to find Serendipity and slowly changing the future for Serendipity's own good.