Which four bands are four nights?

It's a pity that there are four bands in the night, night tour, night deer and real night. Four nights are four nights of Japanese bands, namely: unfortunate night, night tour, night deer, and true night. Unfortunately, there is male harmony in the dark. Is a four-person band, night tour, Japanese pop group, composed of songwriter Ayase and lead singer ikura. Yelu is a Japanese rock band composed of composer n-buna and singer suis. True Night is a music group from Japan.