The four Yuzuki brothers—Hayato, Mikoto, Minato, and young Gakuto—lost their parents two years ago and now work to raise themselves. Together they live, learn, fight, and forgive as brothers should.
Gakuto won a diary. Wondering what to write as the entry, Mikoto mentions, "You can also write about your thoughts and feelings." Encouraged by this, Gakuto chronicles the daily happenings in the Yuzuki household...