Twice's MISAMO will be releasing new song 'Bouquet' for the Japanese Drama 'Liaison: Children Heart Clinic'

[NATE]

Japan isn't like South Korea where they have random OST songs. It is not unusual for songs for an artist to be attached to a drama, movie, to commercial long before it's set for a physical release either as the main track or a b-side. This song is likely being used to put them out there and will appear as a b-side to their proper debut single following TWICE's comeback.