Hanaori-san wa Tensei shitemo Kenka ga Shitai

Narukami Ryusei looks like an ordinary guy who spends all of his time playing video games and relaxing at home. However, he has a dark secrest that: he was a demon lord in his past life, and after being reincarnated on Earth, he just wants to rest and enjoy his normal life. 

Things started to get changed when he came to know that the hero who defeated him in his past life also reincarnated on Earth. He went in search of him and discovered that he was reborn as a cute girl. Will he manage to deal with his enemies while enjoying his normal life, or will trouble find him again?