I Can Settle for a Lookalike

While everyone else lives one life, Tsushishima Kei has lived through two lifetimes and transmigrated one way three times.

What do you think about transmigrating so many times?

Tsushishima Kei: Thanks for asking. The first time, I was dumped in a garbage dump and had to fend for myself. The second time, I was sent to the Taisho era, where I had to slay demons without computers or phones. The third time, at last, I ended up in modern society. Don't ask. All I can say is that peace is the best. It'd be even better if nobody went looking for trouble by researching the cells of some demon scum.

A mysterious black organization, rumored to have existed for a very long time. Its leader is a mystery, and so are its executives. The only thing known is that its research spans a wide range of fields, especially medicine.

Tsushishima Kei held a file that told him nothing even after he read it, and found it strangely familiar.

Mysterious organization = demon organization; existed for a long time = demons have been around since the Heian era; mysterious leader = Kibutsuji Muzan laying low; mysterious executives = the Upper Ranks among the demons; medical research = Kibutsuji Muzan searching for the Blue Spider Lily.

Tsushishima Kei: shocked_pupils.jpg

What is this, a modern AU for the demons and the Demon Slayer Corps? And where are my teammates?

Teammate No. 1: Gathering intelligence and keeping an eye on Tsushishima.

Teammate No. 2: Gathering intelligence and preparing to set Tsushishima up.

Teammate No. 3: Gathering intelligence and preparing to arrest Tsushishima.

Teammate No. 4: Kei, you've worked hard.

Tsushishima: Did I get cast in some kind of undercover spy drama?

Theme: Striving toward your goals