Roselip 0417 Aika ((exclusive)) -

However, a loose backstory has been pieced together from the original promotional materials (translated from Japanese):

Do not apply to dry lips. Use a lip scrub first. Aika recommends using a honey-based lip scrub to smooth the surface. The stain will cling to dead skin cells if you skip this, resulting in patchy color. Roselip 0417 aika