Has-ki, a rapper based in Fukuoka Prefecture and active in a variety of genres, has released a new single "bitter coffee". The music video and jacket were produced with the full cooperation of kataosa coffee, a cafe in a housing complex in Kashiihama. The song is a bittersweet and somewhat sad mix of HipHop, R&B, and j-pop, with the theme of "forget about all the things that are going on in your life and have a cup of coffee to calm down.