Highschool DxD is definitely one of my top 5 ecchi anime. Highschool DxD is about Issei a demon recently reborn into the house of Gremory. From the very beginning the story was intriguing and each character is unique and lovable. Every moment was gripping and by the end I felt like my heart was going to explode from excitement. If you love devils and ecchi then this is the anime for you.