I think that Utsukushii Tenshi to Eien no Akuma means "Eternal Devil and a Beautiful Angel in English", but I'm not sure, so don't count on it. Maybe you might have to ask someone else to be for sure. I'm not Japanese, so I don't know if this is correct or not.
Aishiteru means love and akuma means demon. Though it is not a proper sentence it basically means "I love demons".
English spelling: Akuma Japanese spelling: 悪魔
devil, demon, fiend, Satan, evil spirit
it means "i love you"
nani okottemo aishiteru
devil in is akuma de unless you mean inn
Demon as in "devil" is "akuma." Demon as in "evil spirit" is "youkai."
オオカミの悪魔 Ookami no akuma
demon blade in Japanese is akuma no tsubasa
Zen'nō no akuma
Furasshu no akuma
"aoi akuma"
Hi no akuma