Jin and Akitaka, colleagues from work, best friends and room-sharers for ten years. They become lovers and continue to live together, but Akitaka decides to go on a business trip for a month. For the first time since they met, they keep in touch with each other, but their feelings for each other only grow stronger. When Akitaka gets lost on his business trip, he is helped by a nice young man. That man was Jin's younger brother, Kai. They immediately hit it off by talking about their hobbies, but when Kai asks him about his relationship with Jin, Akitaka is at a loss for an answer...? The long-awaited sequel to the slightly exciting and heart-warming step-up love story between a friendly junior-type boy and a cool, hidden-away boy.