Kento' s mother passed away 7 years ago. Her second husband was a cuisine researcher named Kazuaki. Kento has a dream about being with his father-in-law that will never come true. He never thought he' d be jealous of his mother... Will he ever be freed from these sleepless nights? "Treading Blue" is just the first in this anthology of masterpieces filled with loveable characters, starting with this story of frustrated love between an adorable step-father and his adorable step-son.