Bad ∞ End ∞ Night / Crazy ∞ nighT / Twilight ∞ nighT / EveR ∞ LastinG ∞ NighT is a series composed by Hitoshizuku-P x Yama△, with Suzunosuke (illustrations), Hidari (original character design) and TSO and VAVA as the PV artists. The series consist of four songs: "Bad ∞ End ∞ Night", "Crazy ∞ nighT", "Twilight ∞ nighT", and "EveR ∞ LastinG ∞ NighT", all of which are featured on the EXIT TUNES compilation albums "Vocalodream" "Vocaloconnection" "Vocalosensation" and "Vocalospace".