The Dark-Night Hero in Yokohama

In Yokohama's Suribachi City, with his body shrunk and all his memories gone, Diluc decides that this situation from the start is truly awful.

Rescued from beneath the rubble by an auburn-haired boy named Nakahara Chuuya, Diluc sees how unfamiliar the boy is with this world. Though Diluc's body is still that of a child, he feels like an adult inside, and naturally starts sharing a home with him.

Joining the Sheep is a minor surprise in their lives, but Diluc doesn't mind. Planning to leave once he comes of age, he throws himself into building up his own forces.

By the time he realizes it, Nakahara Chuuya has somehow become the so-called King of the Sheep.

Nakahara Chuuya: This time, I can protect Diluc.

Diluc: ...Whatever makes you happy.

When the Sheep and the GSS betray Chuuya, Diluc learns the truth and, with a stone-cold expression, leads his forces straight into the GSS headquarters.

Nakahara Chuuya, who later learns the truth and joins the Port Mafia: You secretly built up your own forces behind my back?!

Diluc: You joined the Port Mafia behind my back, too.

1. This blurb is provisional. As usual, this is a Genshin Impact crossover. The main world is currently Bungou Stray Dogs; other crossovers to come are undecided.

2. The protagonist is Diluc. No romantic pairings, just friendship. I really can't write romance, and romance wouldn't suit Master Diluc anyway.

3. Diluc is the only Genshin Impact character who will appear. This is a little different from my previous secret identity stories. There will definitely be some out-of-character moments, but I'll do my best to keep them under control. Please go easy on me.

Theme: Yokohama's Darknight Hero