Countless times, in sleepless nights, Dazai Osamu questioned himself over and over: Do you have the right to go on living as a human being?
The child who called himself "Fall into Sin" had a monster's keen vision and a god's lonely soul. From the moment he could understand the world, he struggled to survive in this polluted, oxidized world...
Until
That "Book" appeared.
The "him" in the Book had a partner who shared life and death with him, friends who understood each other, laughter and banter, joy and anger. The vivid life that he had never known, but yearned for more than anything, was all there in the Book's "him."
On a cold night, a child barely over ten curled up inside an old-fashioned mailbox, clutching the magical "Book" and drawing from it a meager, illusory warmth.
But the moment you obtain what you yearn for, losing it one day is inevitable.
He watched "him," gained the light, lost the light, and became the light.
People gathered around him once more, but there would never again be a partner to bicker with all the way back to base, nor anyone to drink with "him" at Lupin.
Because of "him," he had enemies but no partner, colleagues but no friends.
He wouldn't accept it!
Everything had changed.
The "Five-Step" plan unfolded, step by step. Everything seemed to be going just as he had envisioned, until
His very own Chuuya, the Chuuya who had been excluded from the plan,
appeared.
Actually, this is about what happens when Chuuya Nakahara returns while "Boss Dazai" from the IF timeline is killing himself, causing an unexpected turn of events. The true spirit of the "Book" appears, and once more, in pursuit of what he seeks, Dazai becomes a Honkai Master and sets off on a path of "causing trouble."
Theme: Whether it's the Dazai Osamu of the fictional world or the Tsushima Shuji of the real world, both are trapped in hopelessness. Chuuya Nakahara, an embodiment of a god, has his own loneliness, too. May they find warmth in each other.