Before I Changed My Name, I Was Called Mackerel

(Blurb) Just coasting through life.

Who am I? I can't remember.

But in those hazy memories that seem to have been implanted in me, I hear someone calling me Osamu Dazai.

But am I really him?

I stare at the photo in my hand, utterly confused.

1. The protagonist really is Osamu Dazai.

2. The protagonist will deny being an alternate version of Osamu Dazai, but whether anyone believes him is up to them.

3. The protagonist has No Longer Human (a controllable version), as well as his own natural talent, similar to Ranpo's intelligence.

4. The protagonist questions his own existence because he knows too much. He'll get better later on.

5. Pairing: Fyodor/Dazai, no fixed top or bottom.

Theme: Live well.