Sayounara Ryuusei, Konnichiwa Jinsei Episode 5 English Subbed

A long time ago, there was an old and strongest of all dragons that even god himself feared. A human succeeds in defeating that gaint dragon; in this way, his story ends. After that, he was reborn as a human with the name Dolan. He live a simple life and does hard work for his survival. These things make him happy because he could not do all this as a dragon. His life turned suddenly when a girl half-human and Half-part from Snake, Celina came into his life. She was in search of a partner for her but humans were apart from her because of her snake part. Dolan and Celina came very close to each other and started to get attracted to each other. They wanted to spend a life together and for that, they had to face a lot of troubles.