Tropical Night is an extended play (EP) marketed as the seventh single of Japanese boy group JO1, featuring the lead track "Tiger".

The EP single also includes the Japan Record Excellent Work Award winner "Trigger"[2] as well as "We Good" and "Romance", theme songs of television series Our Little Love Story [ja] and Blue Birthday, starring members Syoya Kimata and Shion Tsurubo, respectively.

Twelve days after making their debut performance on the NHK's annual New Year's eve musical show Kōhaku Uta Gassen,[3][4] JO1 announced that they would release a new digital song "We Good" as the theme song of the television series Our Little Love Story [ja], starring member Syoya Kimata, on January 19, 2023.

[16][17] The song was performed for the first time later on the same day at KCON 2023 Thailand, along with the Korean version of "Phobia" from their previous EP single.

The campaign started on March 31, 2023, with JOChum, characters produced by JO1 members in collaboration with Sanrio, transformed into tigers.

[31][32] They also performed "Trigger" on television music specials, Venue101 Presents JO1 Request Live and Kamioto - Kamigata Song Festival.

[38][39] It eventually ranked at number ten and twelve at Oricon and Billboard Japan's mid-year single sales chart of 2023, respectively.