Gokigen Panda, Love Rabbit, Studio UG (Warumeno Neko, Konezumi, Kanda Kon, Kangaesugi Pico-chan, etc.) These are ballpoint pens that were previously sold at stationery stores as limited edition collaboration products. All colors are black. They have been stored, so I believe the ink is still full. Please refrain from purchasing if you are sensitive to the condition, as they have been stored by a private individual.