Btooom! - No Pain , No Game
Sword Art Online - Crossing Fields
Mondaiji Tachi Ga Isekai Kara Kuru Sou Desu You - Black + White
Freezing - COLOR
To-Love Ru - Forever We Can Make It!
Kami Nomi Zu Shiru Sekai - Oratorio The World God Only Knows
Those songs are the best in my opinion
Sword Art Online - Crossing Fields
Mondaiji Tachi Ga Isekai Kara Kuru Sou Desu You - Black + White
Freezing - COLOR
To-Love Ru - Forever We Can Make It!
Kami Nomi Zu Shiru Sekai - Oratorio The World God Only Knows
Those songs are the best in my opinion