Kami no Tou: Ouji no Kikan

It is a story of a tower which is known as god tower so who every climb on it to get a chance of fulfilling their deepest desire no matter what it is. The tower itself selects these kinda people. Ja Wangnan tries his best to reach on top but always fails but does not give up on it. On the 20th floor, he met with Viole and he became his partner and then they continued their journey.